Other Current Assets - Schedule of other current assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Advances to vendors	$ 5,403
Prepaid expenses	750	$ 608
Other receivables	536	132
Total	$ 6,689	$ 740