Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Account payable:
Trade	$ 27,162	$ 24,974
Bank overdraft	101
Total accounts payable	27,263	24,974
Accrued expenses:
Accrued payroll	2,590	1,951
Accrued employee benefits	52	24
Accrued bonuses	43	1,998
Accrued vacation expense	1,077	888
Accrued interest	185	237
Accrued commissions	358	532
Accrued expenses-other	550	306
Accrued warranty	1,032	1,070
Accrued income taxes	1,152	473
Accrued taxes other than income taxes	1,360	1,087
Accrued product liability and workers compensation claims	89	202
Accrued liability on forward currency exchange contracts	20	40
Total accrued expenses	$ 8,508	$ 8,808