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Income Taxes - Components of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 9,059	$ 7,155
Stock-based compensation	140	75
Licensing deduction deferral	3,236	4,059
Contingent consideration	62	973
Lease liability	170	208
Other	217	190
Gross deferred tax assets	12,884	12,660
Valuation allowance	(12,732)	(11,514)
Net deferred tax assets	$ 152	$ 1,146

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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)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319

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

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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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