Income Taxes - Additional Information (Detail) (USD $)
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12 Months Ended | |
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Dec. 31, 2014
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Dec. 31, 2013
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Income Tax Disclosure [Abstract] | ||
Operating loss carryforwards, latest expiration year | 2033 | |
Operating loss carryforwards, expiration date | various years through 2033 | |
Increase in operating loss carryforwards | $ 7,170,000isco_OperatingLossCarryforwardIncreaseDecrease | |
Operating loss carryforwards | 56,083,000us-gaap_OperatingLossCarryforwards | 48,913,000us-gaap_OperatingLossCarryforwards |
Net deferred tax asset recognized | $ 0us-gaap_DeferredTaxAssetsNet | $ 0us-gaap_DeferredTaxAssetsNet |
Change period for unrecognized tax benefits | 12 months |
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- Definition
Operating loss carryforward increase decrease. No definition available.
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- Definition
Operating loss carryforwards expiration date description. No definition available.
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- Definition
Latest year of expiration of operating loss carryforwards, in CCYY format No definition available.
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- Definition
Unrecognized tax benefits change period. No definition available.
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- Definition
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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