Facility Lease - Lessee information (Details) $ in Thousands	46 Months Ended
	Oct. 31, 2018 USD ($) ft²	Mar. 31, 2019 USD ($)	Jan. 31, 2015 ft²
Lessee Disclosure [Abstract]
Area of leased facility | ft²	27,280		8,138
Lease term			1 year
Landlord Provided Free Rent And Lease Incentives	$ 1,900
Operating lease right-of-use asset		$ 2,781