Right of Use Asset and Lease Liability (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jan. 01, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Aug. 31, 2018
Right Of Use Asset and Lease Liability
Remaining term of operating lease (in years)				5 years
Operating lease discount rate		10.00%		10.00%
Transition relief package	true
Right-of-use asset	$ 3,265	$ 1,932		$ 1,932		$ 2,045
Operating Lease, Liability	$ 3,636	$ 3,331		$ 3,331
Lease term (in years)							6 years
Lease renewal term (in years)		5 years		5 years			5 years
Option to extend				true
Rent expense, or operating lease costs		$ 138	$ 177	$ 276	$ 353
Cash payments in the measurement of operating lease liability				$ 390