Prepaid Expenses and Other Current Assets - Components of Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid corporate insurance	$ 93	$ 53
Deposit on inventory	184
Prepaid expenses and other current assets	804	135
Total prepaid expenses and other current assets	$ 1,081	$ 188