REVENUE FROM CONTRACTS WITH CUSTOMERS (Details - Accounts receivable, net) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 4,228	$ 2,920	$ 5,929
Contract assets	480	281	352
Contract liabilities	1,377	333	250
Total accounts receivable, net, contract assets, and contract liabilities	$ 1,857	$ 614	$ 602