Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliations of Effective Income Tax Rate to Federal Statutory Rate (Detail)

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Income Taxes - Reconciliations of Effective Income Tax Rate to Federal Statutory Rate (Detail)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]    
Income tax expense at the statutory rate 34.00% 34.00%
State and local income tax expense 5.41% 4.06%
Foreign income tax (0.24%) 2.86%
Permanent differences 0.75% 2.06%
Research & Development Credits (7.56%) (0.00%)
Other adjustments 0.46% 2.96%
Effective income tax rate 32.82% 45.94%