Annual report pursuant to Section 13 and 15(d)

Reconciliation of Income Tax (Benefit) Expense Computed at Federal Statutory Tax Rate to Actual Income Tax (Benefit) Expense (Detail)

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Reconciliation of Income Tax (Benefit) Expense Computed at Federal Statutory Tax Rate to Actual Income Tax (Benefit) Expense (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Reconciliation of Statutory Federal Tax Rate [Line Items]      
Expense derived by applying the Federal income tax rate to income (loss) before taxes $ 3,291 $ (504) $ 275
State income tax, net of federal benefit 445 146 202
Foreign income tax (55) 215 (78)
Change in valuation allowance   (660) 2,343
Benefits of assets not previously recognized   (97) (2,343)
Nondeductible expenses 361 674 337
Stock-based compensation 171 137  
Tax credits   53 (87)
Changes in tax rates   (138) 33
Other 6 (36) 37
Total income tax provision (benefit) $ 4,219 $ (210) $ 719