Commitments and Contingencies (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Movement in Standard Product Warranty Accrual [Roll Forward]
Warranty liability balance, beginning of the period	$ 1,821	$ 2,553
Product warranty accruals	346	985
Utilization of accrual	(850)	(1,489)
Warranty liability balance, end of the period	1,317	$ 2,049
Product Warranty Accrual, Current	1,000		$ 1,500
Product Warranty Accrual, Noncurrent	$ 300		$ 400
Minimum [Member]
Product Warranty Liability [Line Items]
Warranty, Term	12 months
Maximum [Member]
Product Warranty Liability [Line Items]
Warranty, Term	24 months