Restructuring and Exit Costs (Details Textual) ft² in Thousands, $ in Thousands	3 Months Ended		6 Months Ended		15 Months Ended	18 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2015 ft²
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs	$ 0	$ 109	$ 997	$ 297
Comprehensive 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs	0		1,000
Comprehensive 2017 Restructuring Plan | Employee Severance Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs			997
Cash payments with restructuring plan			600
Amount of liability	397		397				$ 0
2015 Consolidation of US Manufacturing Operations
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs					$ 2,800
Accelerated equipment depreciation expense					600
Cash payments with restructuring plan						$ 1,500
2015 Consolidation of US Manufacturing Operations | Restructuring and exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs		100		300
2015 Consolidation of US Manufacturing Operations | Cost of revenue
Restructuring Cost and Reserve [Line Items]
Accelerated equipment depreciation expense				100
2015 Consolidation of US Manufacturing Operations | Lease Obligation Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs					1,300
Square feet of manufacturing facility | ft²								60
Amount of liability	600		600				$ 800
2015 Consolidation of US Manufacturing Operations | Employee Severance Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs					1,200
Cash payments with restructuring plan		$ 200		$ 400
2015 Consolidation of US Manufacturing Operations | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs					$ 300
Maximum | Comprehensive 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and exist costs, expected cost	$ 1,000		$ 1,000