Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Deferred tax liabilities:
Intangible assets	$ 2,001	$ 2,247	$ 2,282
Total deferred tax liabilities	2,001us-gaap_DeferredIncomeTaxLiabilities	2,247us-gaap_DeferredIncomeTaxLiabilities	2,282us-gaap_DeferredIncomeTaxLiabilities
Deferred tax assets:
Loss carryforwards	63,560	54,253	49,598
Capital loss carryforward	841	844	817
Property and equipment	1,135	1,149	1,327
License fees	7,055fcsc_DeferredTaxAssetsLicenseFees	5,393fcsc_DeferredTaxAssetsLicenseFees	0fcsc_DeferredTaxAssetsLicenseFees
Accrued expenses and other	602us-gaap_DeferredTaxAssetsOther	412us-gaap_DeferredTaxAssetsOther	360us-gaap_DeferredTaxAssetsOther
Stock compensation	2,953	2,698	2,492
Total deferred tax assets	76,146us-gaap_DeferredTaxAssetsGross	64,749us-gaap_DeferredTaxAssetsGross	54,594us-gaap_DeferredTaxAssetsGross
Less: valuation allowance	(74,145)	(62,502)	(52,312)
Total deferred tax assets	2,001us-gaap_DeferredTaxAssetsNet	2,247us-gaap_DeferredTaxAssetsNet	2,282us-gaap_DeferredTaxAssetsNet
Net deferred tax assets	$ 0us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 0us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 0us-gaap_DeferredTaxAssetsLiabilitiesNet

Deferred tax assets license fees.

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Amount of deferred tax liability attributable to taxable temporary differences.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill.

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