Accounts Receivable, net (Details - Accounts receivable) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Receivables [Abstract]
Accounts receivable	$ 24,441	$ 25,419
Less: Allowance for credit losses	(1,750)	(2,820)	$ (245)
Accounts receivable, net	$ 22,691	$ 22,599