Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 528	$ 1,231	$ 84	$ 1,759	$ 173
2015 California manufacturing operations restructuring plan
Restructuring Cost and Reserve [Line Items]
Restructuring expenses			$ 100		$ 200
Employee severance | Severance liability and post employment benefits in connection with Globus transaction
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 500			$ 1,800