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Common Shares (Detail) | Dec. 31, 2014 | Dec. 31, 2013
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Common Stock, Shares, Issued | 23,027,704 us-gaap_CommonStockSharesIssued | 22,701,613 us-gaap_CommonStockSharesIssued
Common Stock, Shares, Outstanding | 22,860,398 us-gaap_CommonStockSharesOutstanding | 22,592,956 us-gaap_CommonStockSharesOutstanding
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
Stock options | Reserved For Issuance Upon Exercise Or Vesting Of Equity Awards |  |
Common Stock, Capital Shares Reserved for Future Issuance | 1,546,500 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = ftek_ReservedForIssuanceUponExerciseOrVestingOfEquityAwardsMember | 1,678,000 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = ftek_ReservedForIssuanceUponExerciseOrVestingOfEquityAwardsMember
Nil Coupon Perpetual Loan Notes |  |
Common Stock, Capital Shares Reserved for Future Issuance | 6,715 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_ConversionOfStockByUniqueDescriptionAxis = ftek_NilCouponPerpetualLoanNotesMember | 6,715 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_ConversionOfStockByUniqueDescriptionAxis = ftek_NilCouponPerpetualLoanNotesMember

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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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