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11. Commitments and Contingencies (Details - Lease - Cash flow) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Cash paid for amounts included in the measurement of lease liabilities:      
Operating cash flows from operating leases $ 7,584 $ 6,809 $ 6,053
Operating cash flows from finance leases 133 37 73
Financing cash flows from finance leases $ 27 $ 9 $ 17