Accounts Payable and Accrued Liabilities - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Payables and Accruals [Abstract]
Trade and accrued payables	$ 6,720	$ 7,547
Warranty	312	492	$ 510
Customer deposits	591	484
Other	15	15
Accounts Payable and Accrued Liabilities	$ 7,638	$ 8,538