Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v2.4.0.6
Income Taxes - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Income Tax Disclosure [Abstract]    
Taxable Income Adjustment from Tax Examination $ 0  
Provision for income taxes 80,000 61,000
Unrecognized tax benefits 50,000  
Period of change of unrecognized tax benefits 12 months  
Accrued interest and penalties $ 0