English
Segment disclosures
Company overviewFUEL TECH, INC.
Each reported dimension combination stays separate. Revenue and operating income are shown as reported, with their dates and sources.
Revenue · Reported segment facts
Counts describe retained dimensioned rows only. Periods and members can change across reports, and this view does not infer missing values or expected segment totals.
Operating Segments · Air Pollution Control
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ftek:AirPollutionControlMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-07-01 – 2023-09-30 | 3711000 | USD | 20231107 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 10692000 | USD | 20231107 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 3422000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 6981000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 3559000 | USD | 20230509 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 2728000 | USD | 20231107 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 7670000 | USD | 20231107 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 2738000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 4942000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 2204000 | USD | 20230509 | Open filing evidence |
Operating Segments · FUELCHEM
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ftek:FUELCHEMMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-07-01 – 2023-09-30 | 4277000 | USD | 20231107 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 10044000 | USD | 20231107 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 2039000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 5767000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 3728000 | USD | 20230509 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 5289000 | USD | 20231107 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 12250000 | USD | 20231107 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 3630000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 6961000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 3331000 | USD | 20230509 | Open filing evidence |
Ancillary Revenue · Air Pollution Control
Product Or Service · Statement Business Segments
Multiple units reported for the same period; values are kept separate.
Source dimensions
srt:ProductOrServiceAxis=ftek:AncillaryRevenueMember;us-gaap:StatementBusinessSegmentsAxis=ftek:AirPollutionControlMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 290000 | USD | 20260804 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 745000 | USD | 20260804 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 455000 | USD | 20260505 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 1749000 | USD | 20260303 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 640000 | USD | 20251104 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 1556000 | USD | 20251104 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 436000 | USD | 20260804 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 917000 | USD | 20260804 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 481000 | USD | 20260505 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 1729000 | USD | 20260303 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 246000 | USD | 20251104 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 1226000 | USD | 20251104 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 525000 | USD | 20250805 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 980000 | USD | 20250805 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 455000 | USD | 20250512 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 1747000 | USD | 20250304 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 462000 | USD | 20241106 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 1305000 | USD | 20241106 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 440000 | USD | 20240806 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 843000 | USD | 20240806 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 403000 | USD | 20240507 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 1751000 | USD | 20240311 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 440000 | USD | 20231107 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 1217000 | USD | 20231107 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 510000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 777000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 267000 | USD | 20230509 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 1569000 | USD | 20230307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 365000 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 1246000 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 527000 | USD | 20220810 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 881000 | USD | 20220810 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 354000 | iso4217-usd | 20210512 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 354000 | USD | 20220510 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 1983000 | iso4217-usd | 20210315 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 1983000 | USD | 20220308 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 306000 | iso4217-usd | 20201110 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 306000 | USD | 20211109 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 828000 | iso4217-usd | 20201110 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 828000 | USD | 20211109 | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 254000 | USD | 20210810 | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 522000 | USD | 20210810 | Open filing evidence |
| 2020-01-01 – 2020-03-31 | 268000 | iso4217-usd | 20210512 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 2411000 | iso4217-usd | 20210315 | Open filing evidence |
| 2019-07-01 – 2019-09-30 | 326000 | iso4217-usd | 20201110 | Open filing evidence |
| 2019-01-01 – 2019-09-30 | 1849000 | iso4217-usd | 20201110 | Open filing evidence |
Ancillary Revenue · Air Pollution Control Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=ftek:AncillaryRevenueMember;us-gaap:StatementBusinessSegmentsAxis=ftek:AirPollutionControlSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-04-01 – 2020-06-30 | 254000 | USD | 20200811 | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 522000 | USD | 20200811 | Open filing evidence |
| 2020-01-01 – 2020-03-31 | 268000 | USD | 20200512 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 2411000 | USD | 20200312 | Open filing evidence |
| 2019-07-01 – 2019-09-30 | 326000 | USD | 20191113 | Open filing evidence |
| 2019-01-01 – 2019-09-30 | 1849000 | USD | 20191113 | Open filing evidence |
| 2019-04-01 – 2019-06-30 | 624000 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-06-30 | 1523000 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-03-31 | 899000 | USD | 20200512 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 2158000 | USD | 20200312 | Open filing evidence |
| 2018-07-01 – 2018-09-30 | 346000 | USD | 20191113 | Open filing evidence |
| 2018-01-01 – 2018-09-30 | 1493000 | USD | 20191113 | Open filing evidence |
| 2018-04-01 – 2018-06-30 | 586000 | USD | 20190813 | Open filing evidence |
| 2018-01-01 – 2018-06-30 | 1147000 | USD | 20190813 | Open filing evidence |
| 2018-01-01 – 2018-03-31 | 561000 | USD | 20190513 | Open filing evidence |
| 2017-01-01 – 2017-12-31 | 2364000 | USD | 20200312 | Open filing evidence |
| 2017-07-01 – 2017-09-30 | 1122000 | USD | 20181113 | Open filing evidence |
| 2017-01-01 – 2017-09-30 | 2032000 | USD | 20181113 | Open filing evidence |
| 2017-04-01 – 2017-06-30 | 524000 | USD | 20180813 | Open filing evidence |
| 2017-01-01 – 2017-06-30 | 909000 | USD | 20180813 | Open filing evidence |
| 2016-01-01 – 2016-12-31 | 2642000 | USD | 20190314 | Open filing evidence |
Spare Parts · Air Pollution Control
Product Or Service · Statement Business Segments
Multiple units reported for the same period; values are kept separate.
Source dimensions
srt:ProductOrServiceAxis=ftek:SparePartsMember;us-gaap:StatementBusinessSegmentsAxis=ftek:AirPollutionControlMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 417000 | USD | 20260804 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 811000 | USD | 20260804 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 394000 | USD | 20260505 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 1739000 | USD | 20260303 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 840000 | USD | 20251104 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 1516000 | USD | 20251104 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 425000 | USD | 20260804 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 675000 | USD | 20260804 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 251000 | USD | 20260505 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 1616000 | USD | 20260303 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 424000 | USD | 20251104 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 1428000 | USD | 20251104 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 805000 | USD | 20250805 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 1004000 | USD | 20250805 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 199000 | USD | 20250512 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 2239000 | USD | 20250304 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 1339000 | USD | 20241106 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 1938000 | USD | 20241106 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 425000 | USD | 20240806 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 599000 | USD | 20240806 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 174000 | USD | 20240507 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 911000 | USD | 20240311 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 384000 | USD | 20231107 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 742000 | USD | 20231107 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 262000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 358000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 96000 | USD | 20230509 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 1138000 | USD | 20230307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 407000 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 823000 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 236000 | USD | 20220810 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 416000 | USD | 20220810 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 180000 | iso4217-usd | 20210512 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 180000 | USD | 20220510 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 906000 | iso4217-usd | 20210315 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 906000 | USD | 20220308 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 254000 | iso4217-usd | 20201110 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 254000 | USD | 20211109 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 667000 | iso4217-usd | 20201110 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 667000 | USD | 20211109 | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 214000 | USD | 20210810 | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 413000 | USD | 20210810 | Open filing evidence |
| 2020-01-01 – 2020-03-31 | 199000 | iso4217-usd | 20210512 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 1031000 | iso4217-usd | 20210315 | Open filing evidence |
| 2019-07-01 – 2019-09-30 | 299000 | iso4217-usd | 20201110 | Open filing evidence |
| 2019-01-01 – 2019-09-30 | 832000 | iso4217-usd | 20201110 | Open filing evidence |
Spare Parts · Air Pollution Control Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=ftek:SparePartsMember;us-gaap:StatementBusinessSegmentsAxis=ftek:AirPollutionControlSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-04-01 – 2020-06-30 | 214000 | USD | 20200811 | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 413000 | USD | 20200811 | Open filing evidence |
| 2020-01-01 – 2020-03-31 | 199000 | USD | 20200512 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 1031000 | USD | 20200312 | Open filing evidence |
| 2019-07-01 – 2019-09-30 | 299000 | USD | 20191113 | Open filing evidence |
| 2019-01-01 – 2019-09-30 | 832000 | USD | 20191113 | Open filing evidence |
| 2019-04-01 – 2019-06-30 | 384000 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-06-30 | 533000 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-03-31 | 149000 | USD | 20200512 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 1083000 | USD | 20200312 | Open filing evidence |
| 2018-07-01 – 2018-09-30 | 334000 | USD | 20191113 | Open filing evidence |
| 2018-01-01 – 2018-09-30 | 863000 | USD | 20191113 | Open filing evidence |
| 2018-04-01 – 2018-06-30 | 229000 | USD | 20190813 | Open filing evidence |
| 2018-01-01 – 2018-06-30 | 529000 | USD | 20190813 | Open filing evidence |
| 2018-01-01 – 2018-03-31 | 300000 | USD | 20190513 | Open filing evidence |
| 2017-01-01 – 2017-12-31 | 1022000 | USD | 20200312 | Open filing evidence |
| 2017-07-01 – 2017-09-30 | 312000 | USD | 20181113 | Open filing evidence |
| 2017-01-01 – 2017-09-30 | 848000 | USD | 20181113 | Open filing evidence |
| 2017-04-01 – 2017-06-30 | 267000 | USD | 20180813 | Open filing evidence |
| 2017-01-01 – 2017-06-30 | 536000 | USD | 20180813 | Open filing evidence |
| 2016-01-01 – 2016-12-31 | 1328000 | USD | 20190314 | Open filing evidence |
Technology Solutions · Air Pollution Control
Product Or Service · Statement Business Segments
Multiple units reported for the same period; values are kept separate.
Source dimensions
srt:ProductOrServiceAxis=ftek:TechnologySolutionsMember;us-gaap:StatementBusinessSegmentsAxis=ftek:AirPollutionControlMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 2078000 | USD | 20260804 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 2833000 | USD | 20260804 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 755000 | USD | 20260505 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 5420000 | USD | 20260303 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1227000 | USD | 20251104 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 3443000 | USD | 20251104 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 1644000 | USD | 20260804 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 2216000 | USD | 20260804 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 571000 | USD | 20260505 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 7897000 | USD | 20260303 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 2554000 | USD | 20251104 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 6837000 | USD | 20251104 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 2619000 | USD | 20250805 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 4283000 | USD | 20250805 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 1664000 | USD | 20250512 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 9497000 | USD | 20250304 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 1910000 | USD | 20241106 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 7449000 | USD | 20241106 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 2557000 | USD | 20240806 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 5539000 | USD | 20240806 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 2982000 | USD | 20240507 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 7935000 | USD | 20240311 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 1904000 | USD | 20231107 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 5711000 | USD | 20231107 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 1966000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 3807000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 1841000 | USD | 20230509 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 4189000 | USD | 20230307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 1172000 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 1768000 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 223000 | USD | 20220810 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 596000 | USD | 20220810 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 373000 | iso4217-usd | 20210512 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 373000 | USD | 20220510 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 5668000 | iso4217-usd | 20210315 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 5668000 | USD | 20220308 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 2326000 | iso4217-usd | 20201110 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 2326000 | USD | 20211109 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 4524000 | iso4217-usd | 20201110 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 4524000 | USD | 20211109 | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 1469000 | USD | 20210810 | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 2198000 | USD | 20210810 | Open filing evidence |
| 2020-01-01 – 2020-03-31 | 729000 | iso4217-usd | 20210512 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 10640000 | iso4217-usd | 20210315 | Open filing evidence |
| 2019-07-01 – 2019-09-30 | 1191000 | iso4217-usd | 20201110 | Open filing evidence |
| 2019-01-01 – 2019-09-30 | 9727000 | iso4217-usd | 20201110 | Open filing evidence |
Technology Solutions · Air Pollution Control Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=ftek:TechnologySolutionsMember;us-gaap:StatementBusinessSegmentsAxis=ftek:AirPollutionControlSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-04-01 – 2020-06-30 | 1469000 | USD | 20200811 | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 2198000 | USD | 20200811 | Open filing evidence |
| 2020-01-01 – 2020-03-31 | 729000 | USD | 20200512 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 10640000 | USD | 20200312 | Open filing evidence |
| 2019-07-01 – 2019-09-30 | 1191000 | USD | 20191113 | Open filing evidence |
| 2019-01-01 – 2019-09-30 | 9727000 | USD | 20191113 | Open filing evidence |
| 2019-04-01 – 2019-06-30 | 3795000 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-06-30 | 8536000 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-03-31 | 4741000 | USD | 20200512 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 35176000 | USD | 20200312 | Open filing evidence |
| 2018-07-01 – 2018-09-30 | 10202000 | USD | 20191113 | Open filing evidence |
| 2018-01-01 – 2018-09-30 | 25516000 | USD | 20191113 | Open filing evidence |
| 2018-04-01 – 2018-06-30 | 7592000 | USD | 20190813 | Open filing evidence |
| 2018-01-01 – 2018-06-30 | 15314000 | USD | 20190813 | Open filing evidence |
| 2018-01-01 – 2018-03-31 | 7722000 | USD | 20190513 | Open filing evidence |
| 2017-01-01 – 2017-12-31 | 24422000 | USD | 20200312 | Open filing evidence |
| 2017-07-01 – 2017-09-30 | 7365000 | USD | 20181113 | Open filing evidence |
| 2017-01-01 – 2017-09-30 | 15466000 | USD | 20181113 | Open filing evidence |
| 2017-04-01 – 2017-06-30 | 4754000 | USD | 20180813 | Open filing evidence |
| 2017-01-01 – 2017-06-30 | 8102000 | USD | 20180813 | Open filing evidence |
| 2016-01-01 – 2016-12-31 | 30082000 | USD | 20190314 | Open filing evidence |
Technology Solutions · FUELCHEM
Product Or Service · Statement Business Segments
Multiple units reported for the same period; values are kept separate.
Source dimensions
srt:ProductOrServiceAxis=ftek:TechnologySolutionsMember;us-gaap:StatementBusinessSegmentsAxis=ftek:FUELCHEMMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 3700000 | USD | 20260804 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 8176000 | USD | 20260804 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 4476000 | USD | 20260505 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 17769000 | USD | 20260303 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 4783000 | USD | 20251104 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 12915000 | USD | 20251104 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 3053000 | USD | 20260804 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 8132000 | USD | 20260804 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 5079000 | USD | 20260505 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 13891000 | USD | 20260303 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 4627000 | USD | 20251104 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 10359000 | USD | 20251104 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 3093000 | USD | 20250805 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 5732000 | USD | 20250805 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 2639000 | USD | 20250512 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 13598000 | USD | 20250304 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 4277000 | USD | 20241106 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 10044000 | USD | 20241106 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 2039000 | USD | 20240806 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 5767000 | USD | 20240806 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 3728000 | USD | 20240507 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 16344000 | USD | 20240311 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 5289000 | USD | 20231107 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 12250000 | USD | 20231107 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 3630000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 6961000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 3331000 | USD | 20230509 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 17365000 | USD | 20230307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 5615000 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 13973000 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 4232000 | USD | 20220810 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 8358000 | USD | 20220810 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 4126000 | iso4217-usd | 20210512 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 4126000 | USD | 20220510 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 13993000 | iso4217-usd | 20210315 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 13993000 | USD | 20220308 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 5269000 | iso4217-usd | 20201110 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 5269000 | USD | 20211109 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 10315000 | iso4217-usd | 20201110 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 10315000 | USD | 20211109 | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 2464000 | USD | 20210810 | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 5046000 | USD | 20210810 | Open filing evidence |
| 2020-01-01 – 2020-03-31 | 2582000 | iso4217-usd | 20210512 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 16385000 | iso4217-usd | 20210315 | Open filing evidence |
| 2019-07-01 – 2019-09-30 | 4636000 | iso4217-usd | 20201110 | Open filing evidence |
| 2019-01-01 – 2019-09-30 | 13147000 | iso4217-usd | 20201110 | Open filing evidence |
Technology Solutions · Fuel Chem Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=ftek:TechnologySolutionsMember;us-gaap:StatementBusinessSegmentsAxis=ftek:FuelChemSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-04-01 – 2020-06-30 | 2464000 | USD | 20200811 | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 5046000 | USD | 20200811 | Open filing evidence |
| 2020-01-01 – 2020-03-31 | 2582000 | USD | 20200512 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 16385000 | USD | 20200312 | Open filing evidence |
| 2019-07-01 – 2019-09-30 | 4636000 | USD | 20191113 | Open filing evidence |
| 2019-01-01 – 2019-09-30 | 13147000 | USD | 20191113 | Open filing evidence |
| 2019-04-01 – 2019-06-30 | 4145000 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-06-30 | 8511000 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-03-31 | 4366000 | USD | 20200512 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 18118000 | USD | 20200312 | Open filing evidence |
| 2018-07-01 – 2018-09-30 | 5188000 | USD | 20191113 | Open filing evidence |
| 2018-01-01 – 2018-09-30 | 12836000 | USD | 20191113 | Open filing evidence |
| 2018-04-01 – 2018-06-30 | 3440000 | USD | 20190813 | Open filing evidence |
| 2018-01-01 – 2018-06-30 | 7648000 | USD | 20190813 | Open filing evidence |
| 2018-01-01 – 2018-03-31 | 4208000 | USD | 20190513 | Open filing evidence |
| 2017-01-01 – 2017-12-31 | 17358000 | USD | 20200312 | Open filing evidence |
| 2017-07-01 – 2017-09-30 | 4749000 | USD | 20181113 | Open filing evidence |
| 2017-01-01 – 2017-09-30 | 13434000 | USD | 20181113 | Open filing evidence |
| 2017-04-01 – 2017-06-30 | 4196000 | USD | 20180813 | Open filing evidence |
| 2017-01-01 – 2017-06-30 | 8685000 | USD | 20180813 | Open filing evidence |
| 2016-01-01 – 2016-12-31 | 21109000 | USD | 20190314 | Open filing evidence |
CN · Air Pollution Control Segment
Statement Geographical · Statement Business Segments
Source dimensions
srt:StatementGeographicalAxis=country:CN;us-gaap:StatementBusinessSegmentsAxis=ftek:AirPollutionControlSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2018-01-01 – 2018-12-31 | 3006 | USD | 20190314 | Open filing evidence |
| 2017-01-01 – 2017-12-31 | 8034 | USD | 20190314 | Open filing evidence |
| 2016-01-01 – 2016-12-31 | 5087 | USD | 20190314 | Open filing evidence |
Ancillary Revenue · Air Pollution Control Segment
Product Or Service · Statement Business Segments
Source dimensions
us-gaap:ProductOrServiceAxis=ftek:AncillaryRevenueMember;us-gaap:StatementBusinessSegmentsAxis=ftek:AirPollutionControlSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2018-01-01 – 2018-03-31 | 561 | USD | 20180509 | Open filing evidence |
| 2017-01-01 – 2017-03-31 | 385 | USD | 20180509 | Open filing evidence |
Spare Parts · Air Pollution Control Segment
Product Or Service · Statement Business Segments
Source dimensions
us-gaap:ProductOrServiceAxis=ftek:SparePartsMember;us-gaap:StatementBusinessSegmentsAxis=ftek:AirPollutionControlSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2018-01-01 – 2018-03-31 | 300 | USD | 20180509 | Open filing evidence |
| 2017-01-01 – 2017-03-31 | 269 | USD | 20180509 | Open filing evidence |
Technology Solutions · Air Pollution Control Segment
Product Or Service · Statement Business Segments
Source dimensions
us-gaap:ProductOrServiceAxis=ftek:TechnologySolutionsMember;us-gaap:StatementBusinessSegmentsAxis=ftek:AirPollutionControlSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2018-01-01 – 2018-03-31 | 7722 | USD | 20180509 | Open filing evidence |
| 2017-01-01 – 2017-03-31 | 3348 | USD | 20180509 | Open filing evidence |
Technology Solutions · Fuel Chem Segment
Product Or Service · Statement Business Segments
Source dimensions
us-gaap:ProductOrServiceAxis=ftek:TechnologySolutionsMember;us-gaap:StatementBusinessSegmentsAxis=ftek:FuelChemSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2018-01-01 – 2018-03-31 | 4208 | USD | 20180509 | Open filing evidence |
| 2017-01-01 – 2017-03-31 | 4489 | USD | 20180509 | Open filing evidence |
Air Pollution Control
Statement Business Segments
Multiple units reported for the same period; values are kept separate.
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ftek:AirPollutionControlMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 2785000 | USD | 20260804 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 4389000 | USD | 20260804 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 1604000 | USD | 20260505 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 8908000 | USD | 20260303 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 2707000 | USD | 20251104 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 6515000 | USD | 20251104 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 2505000 | USD | 20260804 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 3808000 | USD | 20260804 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 1303000 | USD | 20260505 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 11242000 | USD | 20260303 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 3224000 | USD | 20251104 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 9491000 | USD | 20251104 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 3949000 | USD | 20250805 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 6267000 | USD | 20250805 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 2318000 | USD | 20250512 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 13483000 | USD | 20250304 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 3711000 | USD | 20241106 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 10692000 | USD | 20241106 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 3422000 | USD | 20240806 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 6981000 | USD | 20240806 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 3559000 | USD | 20240507 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 10597000 | USD | 20240311 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 2728000 | USD | 20231107 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 7670000 | USD | 20231107 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 2738000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 4942000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 2204000 | USD | 20230509 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 6896000 | USD | 20230307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 1944000 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 3837000 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 986000 | USD | 20220810 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 1893000 | USD | 20220810 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 907000 | iso4217-usd | 20210512 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 907000 | USD | 20220510 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 8557000 | iso4217-usd | 20210315 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 8557000 | USD | 20220308 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 2886000 | iso4217-usd | 20201110 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 2886000 | USD | 20211109 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 6019000 | iso4217-usd | 20201110 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 6019000 | USD | 20211109 | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 1937000 | USD | 20210810 | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 3133000 | USD | 20210810 | Open filing evidence |
| 2020-01-01 – 2020-03-31 | 1196000 | iso4217-usd | 20210512 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 14082000 | iso4217-usd | 20210315 | Open filing evidence |
| 2019-07-01 – 2019-09-30 | 1816000 | iso4217-usd | 20201110 | Open filing evidence |
| 2019-01-01 – 2019-09-30 | 12408000 | iso4217-usd | 20201110 | Open filing evidence |
Air Pollution Control Segment
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ftek:AirPollutionControlSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-04-01 – 2020-06-30 | 1937000 | USD | 20200811 | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 3133000 | USD | 20200811 | Open filing evidence |
| 2020-01-01 – 2020-03-31 | 1196000 | USD | 20200512 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 14082000 | USD | 20200312 | Open filing evidence |
| 2019-07-01 – 2019-09-30 | 1816000 | USD | 20191113 | Open filing evidence |
| 2019-01-01 – 2019-09-30 | 12408000 | USD | 20191113 | Open filing evidence |
| 2019-04-01 – 2019-06-30 | 4803000 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-06-30 | 10592000 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-03-31 | 5789000 | USD | 20200512 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 38417000 | USD | 20200312 | Open filing evidence |
| 2018-07-01 – 2018-09-30 | 10882000 | USD | 20191113 | Open filing evidence |
| 2018-01-01 – 2018-09-30 | 27872000 | USD | 20191113 | Open filing evidence |
| 2018-04-01 – 2018-06-30 | 8407000 | USD | 20190813 | Open filing evidence |
| 2018-01-01 – 2018-06-30 | 16990000 | USD | 20190813 | Open filing evidence |
| 2018-01-01 – 2018-03-31 | 8583000 Restated | USD | 20190513 | Open filing evidence |
| 2017-01-01 – 2017-12-31 | 27808000 | USD | 20200312 | Open filing evidence |
| 2017-07-01 – 2017-09-30 | 8799000 | USD | 20181113 | Open filing evidence |
| 2017-01-01 – 2017-09-30 | 18346000 | USD | 20181113 | Open filing evidence |
| 2017-04-01 – 2017-06-30 | 5545000 | USD | 20180813 | Open filing evidence |
| 2017-01-01 – 2017-06-30 | 9547000 | USD | 20180813 | Open filing evidence |
| 2017-01-01 – 2017-03-31 | 4002000 | USD | 20180509 | Open filing evidence |
| 2016-01-01 – 2016-12-31 | 34052000 | USD | 20190314 | Open filing evidence |
| 2016-07-01 – 2016-09-30 | 6042000 | USD | 20171113 | Open filing evidence |
| 2016-01-01 – 2016-09-30 | 29063000 | USD | 20171113 | Open filing evidence |
| 2016-04-01 – 2016-06-30 | 10031000 | USD | 20170814 | Open filing evidence |
| 2016-01-01 – 2016-06-30 | 23021000 | USD | 20170814 | Open filing evidence |
| 2016-01-01 – 2016-03-31 | 12990000 | USD | 20170511 | Open filing evidence |
| 2015-01-01 – 2015-12-31 | 43485000 | USD | 20180312 | Open filing evidence |
| 2015-07-01 – 2015-09-30 | 13078000 | USD | 20161108 | Open filing evidence |
| 2015-01-01 – 2015-09-30 | 31022000 | USD | 20161108 | Open filing evidence |
| 2015-04-01 – 2015-06-30 | 11087000 | USD | 20160809 | Open filing evidence |
| 2015-01-01 – 2015-06-30 | 17944000 | USD | 20160809 | Open filing evidence |
| 2015-01-01 – 2015-03-31 | 6857000 | USD | 20160510 | Open filing evidence |
| 2014-01-01 – 2014-12-31 | 42031000 | USD | 20170314 | Open filing evidence |
| 2014-07-01 – 2014-09-30 | 11140000 | USD | 20151109 | Open filing evidence |
| 2014-01-01 – 2014-09-30 | 33178000 | USD | 20151109 | Open filing evidence |
| 2014-04-01 – 2014-06-30 | 11304000 | USD | 20150810 | Open filing evidence |
| 2014-01-01 – 2014-06-30 | 22038000 | USD | 20150810 | Open filing evidence |
| 2014-01-01 – 2014-03-31 | 10734000 | USD | 20150511 | Open filing evidence |
| 2013-01-01 – 2013-12-31 | 72552000 | USD | 20160324 | Open filing evidence |
| 2013-07-01 – 2013-09-30 | 23420000 | USD | 20141106 | Open filing evidence |
| 2013-01-01 – 2013-09-30 | 56606000 | USD | 20141106 | Open filing evidence |
| 2013-04-01 – 2013-06-30 | 20239000 | USD | 20140811 | Open filing evidence |
| 2013-01-01 – 2013-06-30 | 33186000 | USD | 20140811 | Open filing evidence |
| 2013-01-01 – 2013-03-31 | 12947000 | USD | 20140512 | Open filing evidence |
| 2012-01-01 – 2012-12-31 | 62441000 | USD | 20150316 | Open filing evidence |
| 2012-07-01 – 2012-09-30 | 15432000 | USD | 20131112 | Open filing evidence |
| 2012-01-01 – 2012-09-30 | 43964000 | USD | 20131112 | Open filing evidence |
| 2012-04-01 – 2012-06-30 | 12818000 | USD | 20130807 | Open filing evidence |
| 2012-01-01 – 2012-06-30 | 28532000 | USD | 20130807 | Open filing evidence |
| 2012-01-01 – 2012-03-31 | 15714000 | USD | 20130507 | Open filing evidence |
| 2011-01-01 – 2011-12-31 | 50930000 | USD | 20140310 | Open filing evidence |
| 2011-07-01 – 2011-09-30 | 12223000 | USD | 20121106 | Open filing evidence |
| 2011-01-01 – 2011-09-30 | 32959000 | USD | 20121106 | Open filing evidence |
| 2011-04-01 – 2011-06-30 | 9644000 | USD | 20120806 | Open filing evidence |
| 2011-01-01 – 2011-06-30 | 20736000 | USD | 20120806 | Open filing evidence |
| 2010-01-01 – 2010-12-31 | 40917000 | USD | 20130401 | Open filing evidence |
FUELCHEM
Statement Business Segments
Multiple units reported for the same period; values are kept separate.
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ftek:FUELCHEMMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 3700000 | USD | 20260804 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 8176000 | USD | 20260804 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 4476000 | USD | 20260505 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 17769000 | USD | 20260303 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 4783000 | USD | 20251104 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 12915000 | USD | 20251104 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 3053000 | USD | 20260804 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 8132000 | USD | 20260804 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 5079000 | USD | 20260505 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 13891000 | USD | 20260303 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 4627000 | USD | 20251104 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 10359000 | USD | 20251104 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 3093000 | USD | 20250805 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 5732000 | USD | 20250805 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 2639000 | USD | 20250512 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 13598000 | USD | 20250304 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 4277000 | USD | 20241106 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 10044000 | USD | 20241106 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 2039000 | USD | 20240806 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 5767000 | USD | 20240806 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 3728000 | USD | 20240507 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 16344000 | USD | 20240311 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 5289000 | USD | 20221108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 12250000 | USD | 20221108 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 3630000 | USD | 20220810 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 6961000 | USD | 20220810 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 3331000 | USD | 20220510 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 17365000 | USD | 20230307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 5615000 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 13973000 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 4232000 | USD | 20220810 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 8358000 | USD | 20220810 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 4126000 | iso4217-usd | 20210512 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 4126000 | USD | 20220510 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 13993000 | iso4217-usd | 20210315 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 13993000 | USD | 20220308 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 5269000 | iso4217-usd | 20201110 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 5269000 | USD | 20211109 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 10315000 | iso4217-usd | 20201110 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 10315000 | USD | 20211109 | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 2464000 | USD | 20210810 | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 5046000 | USD | 20210810 | Open filing evidence |
| 2020-01-01 – 2020-03-31 | 2582000 | iso4217-usd | 20210512 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 16385000 | iso4217-usd | 20210315 | Open filing evidence |
| 2019-07-01 – 2019-09-30 | 4636000 | iso4217-usd | 20201110 | Open filing evidence |
| 2019-01-01 – 2019-09-30 | 13147000 | iso4217-usd | 20201110 | Open filing evidence |
Fuel Chem Segment
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ftek:FuelChemSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-04-01 – 2020-06-30 | 2464000 | USD | 20200811 | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 5046000 | USD | 20200811 | Open filing evidence |
| 2020-01-01 – 2020-03-31 | 2582000 | USD | 20200512 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 16385000 | USD | 20200312 | Open filing evidence |
| 2019-07-01 – 2019-09-30 | 4636000 | USD | 20191113 | Open filing evidence |
| 2019-01-01 – 2019-09-30 | 13147000 | USD | 20191113 | Open filing evidence |
| 2019-04-01 – 2019-06-30 | 4145000 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-06-30 | 8511000 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-03-31 | 4366000 | USD | 20200512 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 18118000 | USD | 20200312 | Open filing evidence |
| 2018-07-01 – 2018-09-30 | 5188000 | USD | 20191113 | Open filing evidence |
| 2018-01-01 – 2018-09-30 | 12836000 | USD | 20191113 | Open filing evidence |
| 2018-04-01 – 2018-06-30 | 3440000 | USD | 20190813 | Open filing evidence |
| 2018-01-01 – 2018-06-30 | 7648000 | USD | 20190813 | Open filing evidence |
| 2018-01-01 – 2018-03-31 | 4208000 | USD | 20190513 | Open filing evidence |
| 2017-01-01 – 2017-12-31 | 17358000 | USD | 20200312 | Open filing evidence |
| 2017-07-01 – 2017-09-30 | 4749000 | USD | 20181113 | Open filing evidence |
| 2017-01-01 – 2017-09-30 | 13434000 | USD | 20181113 | Open filing evidence |
| 2017-04-01 – 2017-06-30 | 4196000 | USD | 20180813 | Open filing evidence |
| 2017-01-01 – 2017-06-30 | 8685000 | USD | 20180813 | Open filing evidence |
| 2017-01-01 – 2017-03-31 | 4489000 | USD | 20180509 | Open filing evidence |
| 2016-01-01 – 2016-12-31 | 21109000 | USD | 20190314 | Open filing evidence |
| 2016-07-01 – 2016-09-30 | 6554000 | USD | 20171113 | Open filing evidence |
| 2016-01-01 – 2016-09-30 | 16530000 | USD | 20171113 | Open filing evidence |
| 2016-04-01 – 2016-06-30 | 5144000 | USD | 20170814 | Open filing evidence |
| 2016-01-01 – 2016-06-30 | 9976000 | USD | 20170814 | Open filing evidence |
| 2016-01-01 – 2016-03-31 | 4832000 | USD | 20170511 | Open filing evidence |
| 2015-01-01 – 2015-12-31 | 30179000 | USD | 20180312 | Open filing evidence |
| 2015-07-01 – 2015-09-30 | 8599000 | USD | 20161108 | Open filing evidence |
| 2015-01-01 – 2015-09-30 | 24441000 | USD | 20161108 | Open filing evidence |
| 2015-04-01 – 2015-06-30 | 7596000 | USD | 20160809 | Open filing evidence |
| 2015-01-01 – 2015-06-30 | 15842000 | USD | 20160809 | Open filing evidence |
| 2015-01-01 – 2015-03-31 | 8246000 | USD | 20160510 | Open filing evidence |
| 2014-01-01 – 2014-12-31 | 36986000 | USD | 20170314 | Open filing evidence |
| 2014-07-01 – 2014-09-30 | 10342000 | USD | 20151109 | Open filing evidence |
| 2014-01-01 – 2014-09-30 | 27155000 | USD | 20151109 | Open filing evidence |
| 2014-04-01 – 2014-06-30 | 8886000 | USD | 20150810 | Open filing evidence |
| 2014-01-01 – 2014-06-30 | 16813000 | USD | 20150810 | Open filing evidence |
| 2014-01-01 – 2014-03-31 | 7927000 | USD | 20150511 | Open filing evidence |
| 2013-01-01 – 2013-12-31 | 36786000 | USD | 20160324 | Open filing evidence |
| 2013-07-01 – 2013-09-30 | 10135000 | USD | 20141106 | Open filing evidence |
| 2013-01-01 – 2013-09-30 | 28525000 | USD | 20141106 | Open filing evidence |
| 2013-04-01 – 2013-06-30 | 8853000 | USD | 20140811 | Open filing evidence |
| 2013-01-01 – 2013-06-30 | 18390000 | USD | 20140811 | Open filing evidence |
| 2013-01-01 – 2013-03-31 | 9537000 | USD | 20140512 | Open filing evidence |
| 2012-01-01 – 2012-12-31 | 35203000 | USD | 20150316 | Open filing evidence |
| 2012-07-01 – 2012-09-30 | 9475000 | USD | 20131112 | Open filing evidence |
| 2012-01-01 – 2012-09-30 | 27066000 | USD | 20131112 | Open filing evidence |
| 2012-04-01 – 2012-06-30 | 8093000 | USD | 20130807 | Open filing evidence |
| 2012-01-01 – 2012-06-30 | 17591000 | USD | 20130807 | Open filing evidence |
| 2012-01-01 – 2012-03-31 | 9498000 | USD | 20130507 | Open filing evidence |
| 2011-01-01 – 2011-12-31 | 42738000 | USD | 20140310 | Open filing evidence |
| 2011-07-01 – 2011-09-30 | 11800000 | USD | 20121106 | Open filing evidence |
| 2011-01-01 – 2011-09-30 | 32707000 | USD | 20121106 | Open filing evidence |
| 2011-04-01 – 2011-06-30 | 9377000 | USD | 20120806 | Open filing evidence |
| 2011-01-01 – 2011-06-30 | 20907000 | USD | 20120806 | Open filing evidence |
| 2010-01-01 – 2010-12-31 | 40878000 | USD | 20130401 | Open filing evidence |
Fuel Conversion Segment
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ftek:FuelConversionSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2016-01-01 – 2016-12-31 | 0 | USD | 20170314 | Open filing evidence |
| 2016-01-01 – 2016-03-31 | 0 | USD | 20160510 | Open filing evidence |
| 2015-01-01 – 2015-12-31 | 0 | USD | 20170314 | Open filing evidence |
| 2015-01-01 – 2015-03-31 | 0 | USD | 20160510 | Open filing evidence |
| 2014-01-01 – 2014-12-31 | 0 | USD | 20170314 | Open filing evidence |
Other Segments
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ftek:OtherSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-04-01 – 2020-06-30 | 0 | USD | 20200811 | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 0 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 0 | USD | 20200312 | Open filing evidence |
| 2019-01-01 – 2019-09-30 | 0 | USD | 20191113 | Open filing evidence |
| 2019-04-01 – 2019-06-30 | 0 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-06-30 | 0 | USD | 20200811 | Open filing evidence |
| 2019-01-01 – 2019-03-31 | 0 | USD | 20200512 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 0 | USD | 20200312 | Open filing evidence |
| 2018-07-01 – 2018-09-30 | 0 | USD | 20191113 | Open filing evidence |
| 2018-01-01 – 2018-09-30 | 0 | USD | 20191113 | Open filing evidence |
| 2017-01-01 – 2017-12-31 | 0 | USD | 20200312 | Open filing evidence |
| 2016-01-01 – 2016-12-31 | 0 | USD | 20190314 | Open filing evidence |
| 2016-01-01 – 2016-03-31 | 0 | USD | 20160510 | Open filing evidence |
| 2015-01-01 – 2015-12-31 | 0 | USD | 20180312 | Open filing evidence |
| 2015-07-01 – 2015-09-30 | 0 | USD | 20151109 | Open filing evidence |
| 2015-01-01 – 2015-09-30 | 0 | USD | 20151109 | Open filing evidence |
| 2015-04-01 – 2015-06-30 | 0 | USD | 20150810 | Open filing evidence |
| 2015-01-01 – 2015-06-30 | 0 | USD | 20150810 | Open filing evidence |
| 2015-01-01 – 2015-03-31 | 0 | USD | 20160510 | Open filing evidence |
| 2014-01-01 – 2014-12-31 | 0 | USD | 20170314 | Open filing evidence |
| 2014-07-01 – 2014-09-30 | 0 | USD | 20151109 | Open filing evidence |
| 2014-01-01 – 2014-09-30 | 0 | USD | 20151109 | Open filing evidence |
| 2014-04-01 – 2014-06-30 | 0 | USD | 20150810 | Open filing evidence |
| 2014-01-01 – 2014-06-30 | 0 | USD | 20150810 | Open filing evidence |
| 2014-01-01 – 2014-03-31 | 0 | USD | 20150511 | Open filing evidence |
| 2013-01-01 – 2013-12-31 | 0 | USD | 20160324 | Open filing evidence |
| 2013-07-01 – 2013-09-30 | 0 | USD | 20141106 | Open filing evidence |
| 2013-01-01 – 2013-09-30 | 0 | USD | 20141106 | Open filing evidence |
| 2013-04-01 – 2013-06-30 | 0 | USD | 20140811 | Open filing evidence |
| 2013-01-01 – 2013-06-30 | 0 | USD | 20140811 | Open filing evidence |
| 2013-01-01 – 2013-03-31 | 0 | USD | 20140512 | Open filing evidence |
| 2012-01-01 – 2012-12-31 | 0 | USD | 20150316 | Open filing evidence |
| 2012-07-01 – 2012-09-30 | 0 | USD | 20131112 | Open filing evidence |
| 2012-01-01 – 2012-09-30 | 0 | USD | 20131112 | Open filing evidence |
| 2012-04-01 – 2012-06-30 | 0 | USD | 20130807 | Open filing evidence |
| 2012-01-01 – 2012-06-30 | 0 | USD | 20130807 | Open filing evidence |
| 2011-01-01 – 2011-12-31 | 0 | USD | 20140310 | Open filing evidence |
| 2010-01-01 – 2010-12-31 | 0 | USD | 20130401 | Open filing evidence |
All Other Segments
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=us-gaap:AllOtherSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 20260804 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 20260804 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 0 | USD | 20260505 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 20260303 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 20251104 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 20251104 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 20260804 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 20260804 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 20260505 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 20260303 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20251104 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20251104 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20250805 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20250805 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 0 | USD | 20250512 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20250304 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 0 | USD | 20241106 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 0 | USD | 20241106 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 0 | USD | 20240806 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 0 | USD | 20240806 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 0 | USD | 20240507 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20240311 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 0 | USD | 20220810 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 0 | USD | 20220810 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 0 | USD | 20220510 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20230307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 0 | USD | 20220810 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 0 | USD | 20220810 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 0 | USD | 20220510 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 20220308 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 0 | USD | 20211109 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 0 | USD | 20211109 | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 0 | USD | 20210810 | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 0 | USD | 20210810 | Open filing evidence |