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 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Income Tax Disclosure [Abstract]        
Provision for income taxes $ 320,000 $ 131,000 $ 428,000 $ 211,000
Unrecognized tax benefits     200,000  
Period of change of unrecognized tax benefits     12 months  
Accrued interest on accrued penalties associated with uncertain tax positions 30,000   30,000  
Accrued penalties associated with uncertain tax position 20,000   20,000  
Taxable Income Adjustment from Tax Examination   $ 0   $ 0