INCOME TAXES (Details - Deferred tax assets) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss carryforwards	$ 5,191	$ 5,339
R&D and other credit carryforwards	638	650
Share-based compensation	784	774
Intangible amortization	1	6
Allowance for bad debt	115	18
Other	51	137
Total deferred tax assets	6,780	6,924
Less: valuation allowance	(6,628)	(6,637)
Net deferred tax assets	152	287
Deferred tax liabilities:
Depreciation on property and equipment	(152)	(287)
Total deferred tax liabilities	(152)	(287)
Net deferred tax position	$ 0	$ 0