Right of Use Asset and Lease Liability (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 01, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Aug. 31, 2018
Right Of Use Asset and Lease Liability
Remaining term of operating lease (in years)		5 years 3 months
Operating lease discount rate		10.00%
Transition relief package	true
Lease term (in years)					6 years
Lease renewal term (in years)		5 years			5 years
Option to extend		true
Rent expense, or operating lease costs		$ 138	$ 177
Cash payments in the measurement of operating lease liability		195
Right-of-use asset	$ 3,265	1,989		$ 2,045
Operating Lease, Liability	$ 3,636	$ 3,446