Schedule of deferred tax assets and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Net operating loss	$ 10,194	$ 9,230
Share based compensation	858	782
Reserves and accruals	(24)	(9)
Unrealized Gain on Equity Investment	(2,188)
Gross deferred tax assets	8,840	10,003
Less valuation allowance	(8,840)	(10,003)
Total deferred tax assets
Deferred tax liabilities:
Total deferred tax liabilities
Net deferred tax assets / (liabilities)