Other Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Advertising and marketing	$ 272	$ 213
Deferred revenue	79	1,431
Deposit for sale of Guangzhou factory	4,799	0
Duties	757	1,127
Freight and handling fees	2,176	1,919
Product development	485	454
Product warranty claim costs	218	134	$ 135	$ 35
Professional fees	1,691	1,313
Property, plant, and equipment	1,564	1,017
Sales taxes and VAT	2,587	2,715
Short-term contingent consideration	3,400	0
Third-party commissions	685	853
Tooling	1,769	1,520
Unrealized loss on foreign currency exchange contracts	86	1,623
URC court order and settlement agreement	0	6,622
Utilities	392	331
Other	4,880	3,138
Total other accrued expenses	$ 25,840	$ 24,410