Accrued Warranty (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accrued Warranty
Balance at beginning of period	$ 373	$ 453
Accrued warranty expense	301	480
Warranty claims paid	(389)	(524)
Translation adjustment	(57)	(36)
Balance at end of period	$ 228	$ 373