Income Taxes (Details 3) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Allowance for doubtful accounts	$ 103	$ 187
Accrued liabilities	412	826
Net operating loss carry-forwards	24,798	23,933
Intangible assets	4,259	4,334
Share-based compensation expense	228	2,120
Other	1,370	406
Total gross deferred tax assets	31,181	31,806
Valuation allowance	(30,447)	(31,168)
Deferred tax assets, net of valuation allowance	734	638
Deferred tax liabilities:
Right of use assets	(733)	(638)
Fixed assets	0	0
Other	(1)	0
Total gross deferred tax liabilities	(734)	(638)
Net deferred tax assets	$ 0	$ 0