Other Accrued Expenses and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued Liabilities And Other Liabilities Current [Abstract]
Accrued restructuring	$ 237	$ 633
Accrued professional fees	2,371	1,731
Income taxes payable	334	282
Other accrued expenses	2,090	3,189
Total	$ 5,032	$ 5,835