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Taxation - Valuation Allowances (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | $ 1,833 us-gaap_DeferredTaxAssetsValuationAllowance | $ 1,868 us-gaap_DeferredTaxAssetsValuationAllowance | $ 1,327 us-gaap_DeferredTaxAssetsValuationAllowance
Charged to costs and expenses | 0 ftek_ValuationAllowanceDeferredTaxAssetChangeinAmountChargedtoCostsandExpenses | 0 ftek_ValuationAllowanceDeferredTaxAssetChangeinAmountChargedtoCostsandExpenses | 0 ftek_ValuationAllowanceDeferredTaxAssetChangeinAmountChargedtoCostsandExpenses
(Deductions)/Other | 173 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | (35)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | 541 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Balance at end of period | $ 2,006 us-gaap_DeferredTaxAssetsValuationAllowance | $ 1,833 us-gaap_DeferredTaxAssetsValuationAllowance | $ 1,868 us-gaap_DeferredTaxAssetsValuationAllowance

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- Definition Valuation Allowance Deferred Tax Asset, Change in Amount, Charged to Costs and Expenses + References No definition available. + Details
Name: | ftek_ValuationAllowanceDeferredTaxAssetChangeinAmountChargedtoCostsandExpenses
Namespace Prefix: | ftek_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
Name: | us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_MovementInValuationAllowancesAndReservesRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e32123-109318 + Details
Name: | us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration