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12. Leases (Details 1) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flows (fixed payments) $ 211 $ 122
Operating cash flows (liability reduction) 171 82
Right-of-use assets obtained in exchange for lease obligations:    
Operating leases $ 14 $ 9