Income Taxes (Detail 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Federal and state operating loss carryforwards	$ 33,099	$ 22,485
Equity Compensation	971	206
Temporary differences	138us-gaap_DeferredTaxAssetsOther	113us-gaap_DeferredTaxAssetsOther
Total deferred tax assets	34,208us-gaap_DeferredTaxAssetsGross	22,804us-gaap_DeferredTaxAssetsGross	14,400us-gaap_DeferredTaxAssetsGross
Valuation allowance	$ (34,208)	$ (22,804)

Amount before 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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