Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Accrued compensation and related liabilities	$ 4,379	$ 5,614
Accrued interest	2,663	3,495
Accrued restructuring costs	0	3,400
Other accrued liabilities	1,814	797
Total accrued liabilities	$ 8,856	$ 13,306