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5. Leases (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Leases [Abstract]  
Operating lease cost $ 893
Cash paid for amounts included in the measurement of lease liabilities 850
Operating cash flows from operating leases 0
Right-of-use assets obtained in exchange for new lease liabilities - operating leases $ 8
Weighted-average remaining lease term - operating leases 7 years 3 months 7 days
Weighted-average discount rate - operating leases 3.19%