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Income taxes (Detail) (USD $)	Sep. 29, 2012	Dec. 31, 2011
Deferred Tax Assets, Operating Loss Carryforwards	$ 39,400,000
Valuation Allowance, Amount	3,200,000	13,800,000
Deferred Tax Assets, Net of Valuation Allowance	$ 599,000

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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- Definition

The amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.

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