NOTE 13 - INCOME TAXES (Details 3) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred income tax assets:
Allowance for doubtful accounts	$ 13	$ 8
Inventory and product return reserves	464	467
Compensation accruals	1,723	1,515
Accrued liabilities	129	321
Book-over-tax depreciation and amortization	25	21
Foreign net operating loss carryforwards	3	132
U.S. net operating loss carryforwards	2,904	2,345
U.S. credit carryforwards	2,280	2,161
Deferred tax assets, gross	7,541	6,970
Valuation allowance	(7,541)	(6,970)
Total deferred income tax assets	$ 0	$ 0