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Leases - Supplemental Balance Sheet Information (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
Operating lease ROU assets $ 261 $ 343
Current operating lease liabilities 635 860
Non-current operating lease liabilities 8 9
Total operating lease liabilities $ 643 $ 869
Weighted-average remaining lease term–operating leases 9 months 18 days 1 year
Weighted-average discount rate–operating leases 6.50% 6.50%