Annual report pursuant to Section 13 and 15(d)

Summary of Net Deferred Tax Assets and Net Deferred Tax Liabilities (Detail)

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Summary of Net Deferred Tax Assets and Net Deferred Tax Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Summary Of Net Deferred Tax Assets And Net Deferred Tax Liabilities [Line Items]    
Capitalized intangible assets for tax purposes $ 405 $ 576
Reserves not currently deductible 2,082 2,450
Deferred revenue 328  
Stock options 2,348 1,959
State Taxes 45 41
Income tax credits 1,167 1,322
Inventory 868 906
Property and equipment 240 357
Other comprehensive income 127 144
Unrealized gain on foreign currency 160 99
Net operating losses 25,746 26,075
Total deferred tax assets 33,516 33,929
Valuation allowance (33,341) (33,784)
Net deferred tax assets 175 145
Capitalized intangible assets (703) (630)
State tax      
Other (119) (101)
Total deferred tax liabilities (822) (731)
Net deferred tax liabilities $ (647) $ (586)