Other Accrued Liabilities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Advertising and marketing	$ 232,000	$ 213,000
Deferred revenue	215,000	1,431,000
Deposit for sale of Guangzhou factory	4,901,000	0
Duties	1,184,000	1,127,000
Freight and handling fees	1,983,000	1,919,000
Product development	974,000	454,000
Product warranty claim costs	339,000	134,000
Professional fees	1,578,000	1,313,000
Property, plant and equipment	2,151,000	1,017,000
Sales taxes and VAT	2,955,000	2,715,000
Short-term contingent consideration	3,800,000	0
Third-party commissions	599,000	853,000
Tooling	1,843,000	1,520,000
Unrealized loss on foreign currency exchange contracts	630,000	1,623,000
URC court order and settlement agreement	13,000	6,622,000
Utilities	103,000	331,000
Other	5,219,000	3,138,000
Total other accrued liabilities	28,719,000	24,410,000
JAP Techno Solutions | Related Party Fees Paid
Related Party Transactions [Line Items]
Fees paid to related party	$ 0	$ 0	$ 77,000