Accounts Payable and Accrued Liabilities - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Payables And Accruals [Abstract]
Accounts payable	$ 2,671	$ 3,850
Accrued liabilities:
Employee benefits	7,652	7,388
Customer tooling	320	407
Taxes other than on income	253	266
Professional	75	231
Insurance	244	217
Other	403	437
Total	$ 11,618	$ 12,796