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Stock-Based Compensation - Components of Stock-Based Compensation (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Total stock-based compensation expense | $ 2,322 us-gaap_AllocatedShareBasedCompensationExpense | $ 1,798 us-gaap_AllocatedShareBasedCompensationExpense | $ 1,306 us-gaap_AllocatedShareBasedCompensationExpense
Tax benefit of stock-based compensation expense | (892)us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities | (671)us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities | (472)us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities
After-tax effect of stock based compensation | 1,430 us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax | 1,127 us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax | 834 us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax
Stock options |  |  |
Total stock-based compensation expense | 236 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember | (245)us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember | (66)us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Restricted stock units |  |  |
Total stock-based compensation expense | 2,086 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 2,043 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 1,314 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Deferred directors fees |  |  |
Total stock-based compensation expense | $ 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = ftek_DeferredDirectorsFeesMember | $ 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = ftek_DeferredDirectorsFeesMember | $ 58 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = ftek_DeferredDirectorsFeesMember

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References No definition available. + Details
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- Definition Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11374-113907 + Details
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- Details
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- Details
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