Income Taxes (Components Of Deferred Tax Assets And Liabilities) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Inventory	$ 9,846	$ 8,548
Inventory reserve	7,079	6,541
Allowance for doubtful accounts	430	72
Reserve for accrued liabilities	183	805
Stock options	4,242	5,054
Other	2,058	2,848
Total deferred tax assets	23,838	23,868
Deferred tax liability:
Property, plant and equipment	(9,926)	(9,614)
Net deferred tax asset	$ 13,912	$ 14,254