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v2.4.1.9

Organization and Significant Accounting Policies (Detail) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 segment unit | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Revenues from external customers | $ 79,017 us-gaap_Revenues | $ 109,338 us-gaap_Revenues | $ 97,644 us-gaap_Revenues |
Treasury Stock, Shares, Acquired | 58,649 us-gaap_TreasuryStockSharesAcquired | 99,531 us-gaap_TreasuryStockSharesAcquired |  |
Revenues | 79,017 us-gaap_Revenues | 109,338 us-gaap_Revenues | 97,644 us-gaap_Revenues |
Percentage Of Net Income, Foreign | 36.00%ftek_PercentageOfNetIncomeForeign | 42.00%ftek_PercentageOfNetIncomeForeign | 28.00%ftek_PercentageOfNetIncomeForeign |
Restricted Cash and Cash Equivalents | 1,639 us-gaap_RestrictedCashAndCashEquivalents |  |  |
Unbilled Contracts Receivable | 6,910 us-gaap_UnbilledContractsReceivable | 10,693 us-gaap_UnbilledContractsReceivable |  |
Number of Reportable Segments | 2 us-gaap_NumberOfReportableSegments |  |  |
Number of Reporting Units | 2 ftek_NumberofReportingUnits |  |  |
Finite-Lived Patents, Gross | 1,583 us-gaap_FiniteLivedPatentsGross | 1,273 us-gaap_FiniteLivedPatentsGross |  |
Identifiable intangible assets | 5,158 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill |  |  |
Payments to Acquire Intangible Assets | 3,010 us-gaap_PaymentsToAcquireIntangibleAssets | 0 us-gaap_PaymentsToAcquireIntangibleAssets | 0 us-gaap_PaymentsToAcquireIntangibleAssets |
Useful Life (Yrs) | 5 years |  |  |
Amortization of Intangible Assets | 2,384 us-gaap_AmortizationOfIntangibleAssets | 839 us-gaap_AmortizationOfIntangibleAssets | 898 us-gaap_AmortizationOfIntangibleAssets |
Depreciation | 1,922 us-gaap_Depreciation | 2,175 us-gaap_Depreciation | 2,191 us-gaap_Depreciation |
Stock Awards Available for Issuance Under the Incentive Plan (in shares) | 1,960,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant |  |  |
Options, Outstanding, Number (in shares) | 1,546,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 1,688,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 1,914,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 1,902,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 280,000 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount |  |  |
Available-for-sale Securities, Fair Value Disclosure | 36 us-gaap_AvailableForSaleSecurities | 30 us-gaap_AvailableForSaleSecurities |  |
Treasury Stock, Value, Acquired, Cost Method | 304 us-gaap_TreasuryStockValueAcquiredCostMethod | 447 us-gaap_TreasuryStockValueAcquiredCostMethod | 39 us-gaap_TreasuryStockValueAcquiredCostMethod |
Sales Revenue, Services, Net |  |  |  |
Concentration Risk, Percentage | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember |
Number of Customers | 2 ftek_NumberofCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember | 2 ftek_NumberofCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember | 1 ftek_NumberofCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember |
Accounts Receivable |  |  |  |
Concentration Risk, Percentage | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember |
Number of Customers | 0 ftek_NumberofCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember | 0 ftek_NumberofCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember | 0 ftek_NumberofCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember |
Capitalized Third-party Costs |  |  |  |
Finite-Lived Patents, Gross | 376 us-gaap_FiniteLivedPatentsGross / us-gaap_NatureOfExpenseAxis = ftek_CapitalizedThirdpartyCostsMember | 305 us-gaap_FiniteLivedPatentsGross / us-gaap_NatureOfExpenseAxis = ftek_CapitalizedThirdpartyCostsMember |  |
Minimum |  |  |  |
Standard Product Warranty Description (in years) | 1 year |  |  |
Maximum |  |  |  |
Standard Product Warranty Description (in years) | 2 years |  |  |
Antidilutive |  |  |  |
Options, Outstanding, Number (in shares) | 1,628,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = ftek_AntidilutiveMember | 1,623,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = ftek_AntidilutiveMember | 1,507,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = ftek_AntidilutiveMember |
FUEL CHEM Segment |  |  |  |
Revenues from external customers | 36,986 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = ftek_FuelChemSegmentMember | 36,786 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = ftek_FuelChemSegmentMember | 35,203 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = ftek_FuelChemSegmentMember |
Revenues | 36,986 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = ftek_FuelChemSegmentMember | 36,786 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = ftek_FuelChemSegmentMember | 35,203 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = ftek_FuelChemSegmentMember |
FUEL CHEM Segment | Sales Revenue, Services, Net |  |  |  |
Concentration Risk, Percentage | 20.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember / us-gaap_StatementBusinessSegmentsAxis = ftek_FuelChemSegmentMember |  |  |
Number of Customers | 1 ftek_NumberofCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember / us-gaap_StatementBusinessSegmentsAxis = ftek_FuelChemSegmentMember |  |  |
APC Technology Segment | Sales Revenue, Services, Net |  |  |  |
Concentration Risk, Percentage | 11.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember / us-gaap_StatementBusinessSegmentsAxis = ftek_APCTechnologySegmentMember |  |  |
Customer One | FUEL CHEM Segment | Sales Revenue, Services, Net |  |  |  |
Concentration Risk, Percentage |  | 14.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember / us-gaap_MajorCustomersAxis = ftek_CustomerOneMember / us-gaap_StatementBusinessSegmentsAxis = ftek_FuelChemSegmentMember | 16.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember / us-gaap_MajorCustomersAxis = ftek_CustomerOneMember / us-gaap_StatementBusinessSegmentsAxis = ftek_FuelChemSegmentMember |
Customer One | APC Technology Segment | Sales Revenue, Services, Net |  |  |  |
Concentration Risk, Percentage |  | 18.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember / us-gaap_MajorCustomersAxis = ftek_CustomerOneMember / us-gaap_StatementBusinessSegmentsAxis = ftek_APCTechnologySegmentMember |  |
Project and Non-Project |  |  |  |
Unbilled Contracts Receivable | 9,904 us-gaap_UnbilledContractsReceivable / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = ftek_ProjectandNonProjectMember | 12,599 us-gaap_UnbilledContractsReceivable / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = ftek_ProjectandNonProjectMember |  |
Foreign |  |  |  |
Revenues from external customers | 28,116 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_ForeignCountryMember | 46,063 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_ForeignCountryMember | 27,219 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_ForeignCountryMember |
Revenues | $ 28,116 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_ForeignCountryMember | $ 46,063 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_ForeignCountryMember | $ 27,219 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_ForeignCountryMember |
Reserved For Issuance Upon Exercise Or Vesting Of Equity Awards |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance | 4,483,525 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = ftek_ReservedForIssuanceUponExerciseOrVestingOfEquityAwardsMember | 2,460,516 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = ftek_ReservedForIssuanceUponExerciseOrVestingOfEquityAwardsMember |  |

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