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 operating loss carryforwards.

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Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Net operating losses	$ 10,125	$ 5,960
Total deferred tax assets	10,125us-gaap_DeferredTaxAssetsGross	5,960us-gaap_DeferredTaxAssetsGross
Less: valuation allowance	(10,125)	(5,960)	(5,316)	(1,344)
Deferred tax assets
Net deferred tax assets