Built-to-Suit Lease - Narrative (Details) ft² in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended		129 Months Ended	249 Months Ended
	Jan. 31, 2017 USD ($) ft²	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Sep. 30, 2027 USD ($)	Sep. 30, 2037 USD ($)
Operating Leased Assets [Line Items]
Area of interior floor space (in sqft) | ft²	30
Built-to-suit facility lease obligation		$ 4,600		$ 4,600
Foreign exchange loss		391	$ 3	402	$ 9
Scenario, Forecast
Operating Leased Assets [Line Items]
Total rent expense						$ 2,700	$ 6,200
Property, Plant and Equipment
Operating Leased Assets [Line Items]
Capitalized amount of built-to-suit asset	$ 4,200	5,200		5,200
Other Current Liabilities [Member]
Operating Leased Assets [Line Items]
Built-to-suit facility lease obligation		$ 200		$ 200