Commitments and Contingencies (Narrative) (Details) - USD ($)	1 Months Ended
	Apr. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Commitments and Contingencies
Operating lease base rent	$ 1,900,000
Annual increase in rent percentage	3.00%
Base rent at the end of lease term	$ 2,500,000
Period of lease and rental abatement credit	6 months
Lease and rental abatement credit	$ 800,000
Operating Lease, Liability	11,700,000
Operating Lease, Right-of-Use Asset	$ 11,000,000	$ 10,869,000	$ 2,028,000
Lessee, Operating Lease, Discount Rate	12.89%