Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Cash Flows) (Details)

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Commitments and Contingencies (Cash Flows) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Commitments and Contingencies    
Operating cash flows from operating leases $ 118 $ (270)
Weighted-average remaining lease term - operating leases 5 years 7 months 6 days 3 years 1 month 6 days
Weighted-average discount rate - operating leases 9.00% 9.00%