Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Accrued compensation and related liabilities	$ 6,270	$ 6,956
Accrued interest	3,495	3,495
Accrued restructuring costs	3,400	1,348
Other accrued liabilities	990	2,280
Total accrued liabilities	$ 14,155	$ 14,079