Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred income tax assets
Net operating loss carry forwards	$ 44,754	$ 38,204
Credit carry forwards	3,708	3,708
Fixed Assets	1,466	1,498
Intangibles	23,029	26,287
Equity based compensation	279	301
Nondeductible accruals	2,382	2,485
Various reserves	149	162
Other	51us-gaap_DeferredTaxAssetsOther	36us-gaap_DeferredTaxAssetsOther
Valuation Allowance	(75,744)	(72,582)
Total deferred income taxes - net	74us-gaap_DeferredTaxAssetsNet	99us-gaap_DeferredTaxAssetsNet
Deferred income tax liabilities
Prepaid expenses	(74)	(101)
Total deferred income liabilities	(74)us-gaap_DeferredIncomeTaxLiabilities	(101)us-gaap_DeferredIncomeTaxLiabilities
Net deferred income tax assets (liabilities)		$ (2)us-gaap_DeferredTaxAssetsLiabilitiesNet

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 temporary differences from intangible assets including goodwill.

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

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible 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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The tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance.

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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 before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities.

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

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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 consequences attributable to taxable temporary differences derived from prepaid expenses.

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