Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

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Income Taxes - Additional Information (Detail) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Income Tax Disclosure        
Liability for unrecognized tax benefit, including related estimates of penalties and interest $ 0 $ 0 $ 0 $ 1,000
Income tax provision (benefit) 28,000 22,000 81,000 (182,000)
Projected annual effective tax rate (0.80%) (0.54%) (0.55%) 1.97%
Tax benefit for federal alternative minimum tax credits and California R&D credits       107,000
Tax benefit on reversed deferred tax liabilities and recognized AMT and R&D credits       214,000
Statutory tax rate 34.00% 34.00% 34.00% 34.00%
Other Tax Benefits
       
Income Tax Disclosure        
Tax benefit on reversed certain deferred tax liabilities associated with international operations       $ 107,000