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Taxes (Components of Deferred Tax Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Net operating loss and tax credit carryforwards
Net operating loss and tax credit carryforwards	$ 56,629	$ 42,012
Depreciation, amortization and impairment of property and equipment	34	39
Stock options	67	0
Right of use asset	(32)	(183)
Lease liability	32	195
Deferred tax assets	56,730	42,063
Valuation allowance for deferred tax assets	(56,730)	(42,063)
Net deferred tax assets	$ 0	$ 0

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Deferred tax assets Lease right of use asset.

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- Definition

Represents the amount before allocation of valuation allowances of deferred tax assets attributable to deductible temporary differences from depreciation, amortization and estimated impairment losses.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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-Publisher FASB
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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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