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Components of Deferred Tax Assets (Liabilities) (Parenthetical) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Components Of Deferred Tax Assets And Liabilities [Line Items]
Deferred tax assets net, current	$ 1,755,000us-gaap_DeferredTaxAssetsNetCurrent	$ 1,849,000us-gaap_DeferredTaxAssetsNetCurrent
Deferred tax assets net, non current	1,429,000	1,226,000
Decrease in deferred tax assets valuation allowance	$ (15,000)	$ (7,000)

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer.

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