Accrued Warranty - Summary of Activity (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Accrued Warranty
Balance at beginning of period	$ 338	$ 228
Accrued warranty expense	117	142
Warranty claims paid	(147)	(90)
Translation Adjustment	4	(36)
Balance at end of period	$ 312	$ 244
Minimum
Accrued Warranty
Warrants period	1 year
Maximum
Accrued Warranty
Warrants period	5 years