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5. Commitments and Contingencies (Details 1) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]    
Operating cash flows used in operating leases $ 167 $ 179
Operating cash flows used in finance leases 21 0
Financing cash flows used in finance leases $ 124 $ 0