Built-to-Suit Lease - Narrative (Details) ft² in Thousands, $ in Millions	1 Months Ended	129 Months Ended	249 Months Ended
	Jan. 31, 2017 USD ($) ft²	Sep. 30, 2027 USD ($)	Sep. 30, 2037 USD ($)	Mar. 31, 2017 USD ($)
Operating Leased Assets [Line Items]
Area of interior floor space (in sqft) | ft²	30
Built-to-suit facility lease obligation				$ 4.2
Scenario, Forecast
Operating Leased Assets [Line Items]
Total rent expense		$ 2.5	$ 5.7
Property, Plant and Equipment
Operating Leased Assets [Line Items]
Capitalized amount of built-to-suit asset	$ 4.2