Accounts Payable and Accrued Liabilities - Accounts Payable and Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Disclosure Accounts Payable And Accrued Liabilities Accounts Payable And Accrued Liabilities Detail [Line Items]
Accounts payable	$ 4,196	$ 1,452
Accrued liabilities:
Employee benefits	5,073	6,788
Customer tooling	460	388
Taxes other than on income	393	378
Insurance	226	243
Sales rebates	138	45
Professional	81	86
Other	339	325
Total accounts payable and accrued liabilities	$ 10,906	$ 9,705