INCOME TAXES (Schedule of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
INCOME TAXES [Abstract]
Net operating loss and credit carryforwards	$ 15,941	$ 13,989
Allowance for doubtful accounts	986	666
Stock-based compensation	461	292
Other	39
Gross deferred tax assets	17,427	14,947
Property and equipment	(94)	(95)
Intangible assets	(3,849)	(4,148)
Gross deferred tax liabilities	(3,943)	(4,243)
Net deferred tax assets	13,484	10,704
Less valuation allowance	(13,484)	(10,704)
Net deferred liability	$ 0	$ 0