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(1) Summary of Significant Accounting Policies (Details - Lease cost) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Accounting Policies [Abstract]        
Operating lease cost $ 1,768 $ 1,885 $ 5,398 $ 5,654
Finance lease cost 308 299 924 871
Total lease cost $ 2,076 $ 2,184 $ 6,322 $ 6,525