8. INCOME TAXES (Details - Deferred tax assets) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Net operating loss carryforwards	$ 5,339	$ 4,521
R&D andother credit carryforwards	650	663
Share-based compensation	774	757
Intangible amortization	6	11
Allowance for bad debt	18	2
Other	137	193
Total deferred tax assets	6,924	6,147
Less: valuation allowance	(6,637)	(5,385)
Net deferred tax assets	287	762
Deferred tax liabilities:
Depreciation on property and equipment	(287)	(762)
Total deferred tax liabilities	(287)	(762)
Net deferred tax position	$ 0	$ 0