Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Accrued Liabilities [Line Items]
Accrued compensation and related costs	$ 5,198	$ 3,951
Accrued professional services	2,337	2,123
Accrued inventory costs	73	870
Accrued customer costs	987	385
Accrued insurance premiums	438	264
Other accrued expenses	820	851
Total accrued liabilities	$ 9,853	$ 8,444