Debt - Maturities of Outstanding Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	[1]
Debt Disclosure [Abstract]
2017	$ 853
2018	1,078
2019	886
2020	345
Total	3,162
Current portion	(1,029)	$ (1,015)
Discount on long-term debt	(8)
Non-current portion of debt	$ 2,125	$ 2,381

[1] Derived from our audited consolidated financial statements as of December 31, 2016.