Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Accrued salaries and benefits	$ 5,445	$ 3,637
Accrued judgments and settlements	0	65
Accrued professional fees	286	718
Accrued warranty expense	785	314	$ 456	$ 675
Accrued income and other taxes	670	1,215
Other accrued liabilities	3,196	2,694
Accrued liabilities	$ 10,382	$ 8,643