Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Income Taxes - Reconciliations of Effective Income Tax Rate to Federal Statutory Rate (Detail)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]    
Income tax expense at the statutory rate 34.00% 34.00%
State and local income tax expense 9.16% 5.81%
Foreign income tax (3.79%) (0.33%)
Permanent differences (38.40%) 1.05%
Research & Development Credits 37.81% (10.47%)
Other adjustments 0.31% 0.14%
Effective income tax rate 39.09% 30.20%