Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Cash Flows) (Details)

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Commitments and Contingencies (Cash Flows) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Commitments and Contingencies    
Operating cash flows from operating leases $ 76 $ 148
Weighted-average remaining lease term - operating leases 5 years 9 months 18 days 4 years 3 months 18 days
Weighted-average discount rate - operating leases 9.00% 9.00%