Accrual Detail - Schedule of Accounts Payable and Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Account payable:
Trade	$ 25,101	$ 18,268
Bank overdraft		153
Total accounts payable	25,101	18,421
Accrued expenses:
Accrued payroll	1,084	669
Accrued employee health	261	80
Accrued bonuses	1,838	1,007
Accrued vacation expense	384	348
Accrued consulting fees		263
Accrued deferred interest income	33	68
Accrued insurance premiums	266	65
Accrued interest	148	141
Accrued commissions	617	481
Accrued expenses-other	624	282
Accrued warranty	988	698
Accrued income taxes	1,160	80
Accrued taxes other than income taxes	242	574
Accrued product Liability and workers compensation claims	87	113
Accrued liability on forward currency exchange contracts	13	77
Total accrued expenses	$ 7,745	$ 4,946