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Components of Net Deferred Income Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Deferred Income Tax Assets and Liabilities [Line Items]
Current (included in prepaid expenses and other)	$ 590	$ 439	$ 401
Non-current (included in other assets (other long-term liabilities)	(41)	207	335
Total	$ 549	$ 646	$ 736

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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- Definition

Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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