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Income Taxes - Deferred taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Income Taxes
Net operating loss carry forwards	$ 16,044	$ 14,620
Accrued liabilities	22	90
Stock compensation	263	120
Depreciation	26	(10)
Prepaid expenses	43	20
Other	(10)	(10)
Deferred tax assets, net	16,388	14,830
Valuation allowance	(16,388)	(14,830)
Net deferred tax asset	$ 0	$ 0

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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