8. INCOME TAXES (Details - Deferred tax assets) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Net operating loss carryforwards	$ 4,521	$ 4,245
R&D and other credit carryforwards	663	685
Share-based compensation	757	730
Intangible amortization	11	16
Allowance for bad debt	2	2
Other	193	16
Total deferred tax assets	6,147	5,694
Less: valuation allowance	(5,385)	(4,837)
Net deferred tax assets	762	857
Deferred tax liabilities:
Depreciation on property and equipment	(762)	(857)
Amortization of intangibles	0	0
Total deferred tax liabilities	(762)	(857)
Net deferred tax position	$ 0	$ 0