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Components of Deferred Tax Assets (liabilities) (Parenthetical) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Components Of Deferred Tax Assets And Liabilities [Line Items]
Deferred tax assets, net, current	$ 1,849,000	$ 1,787,000
Deferred tax assets, net, non current	1,285,000	1,127,000
Increase in deferred tax assets valuation allowance	$ 163,000	$ 15,000	$ 37,000

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 expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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- Definition

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.

+ References+ Details