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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Summary of Reconciliation of Statutory IncomeTax Rate

The following table reconciles the United States statutory income tax rate to the Company's effective income tax rate:

		Year ended December 31,
		2021				2020				2019
United States statutory rate			21.0	%			21.0	%			21.0	%
State tax, net of federal benefit			1.0	%			4.2	%			1.0	%
Stock-based compensation			(0.7	%)			(0.5	%)			(1.6	%)
Officer compensation			1.5	%			(1.0	%)			(1.3	%)
Deferred rate change			—	%			—	%			—	%
R&D credit			1.4	%			0.8	%			1.8	%
PPP Loan			1.1	%			—	%			—	%
Other			0.1	%			(0.1	)%			0.3	%
Change in valuation allowance			(25.4	%)			(24.4	%)			(21.2	%)
Effective income tax rate			—	%			—	%			—	%

Schedule of Deferred Tax Assets And Liabilities

Deferred assets and liabilities consist of the following:

		December 31,
In Thousands		2021				2020				2019
Net operating losses		$	38,671			$	33,392			$	24,852
Stock-based compensation			2,724				2,531				3,637
Financing lease obligations			3,820				4,574				4,640
Tax credit carry forwards			3,210				2,577				2,106
Compensation			514				339				97
Derivative liability			—				703				—
Other			143				391				307
Gross deferred tax assets			49,082				44,507				35,639
Less valuation allowance			(45,369	)			(39,898	)			(30,888	)
Net deferred tax assets			3,713				4,609				4,751
Fixed assets			(3,667	)			(4,609	)			(4,746	)
Other			(46	)			—				(5	)
Gross deferred tax liabilities			(3,713	)			(4,609	)			(4,751	)
Net deferred tax asset or liability		$	—			$	—			$	—

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- References

No definition available.

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- Definition

Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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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- Definition

Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319

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