Other Accrued Expenses and Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accrued Liabilities And Other Liabilities Current [Abstract]
Accrued restructuring	$ 134	$ 237
Accrued professional fees	2,114	2,371
Income taxes payable	287	334
Other accrued expenses	1,527	2,090
Total	$ 4,062	$ 5,032