Balance Sheet Components - Components of Other Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Payables And Accruals [Abstract]
Accrued interest	$ 3,032
Accrued compensation	2,035	$ 2,781
Accrued capital project payment	916
Accrued professional fees	569	1,144
Other	438	768
Total other accrued liabilities	$ 6,990	$ 4,693