Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

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,
	2022			2021			2020
United States statutory rate		21.0	%		21.0	%		21.0	%
State tax, net of federal benefit		1.0	%		1.0	%		4.2	%
Stock-based compensation		(1.7	%)		(0.7	%)		(0.5	%)
Officer compensation		(1.4	%)		1.5	%		(1.0	%)
Deferred rate change		—	%		—	%		—	%
R&D credit		2.2	%		1.4	%		0.8	%
PPP Loan		—	%		1.1	%		—	%
Unrealized (gain) loss on mark-to-market of common stock warrants		6.4	%		—	%		—	%
Other		—	%		0.1	%		(0.1	)%
Change in valuation allowance		(27.5	%)		(25.4	%)		(24.4	%)
Effective income tax rate		—	%		—	%		—	%

Schedule of Deferred Tax Assets And Liabilities

Deferred assets and liabilities consist of the following:

	December 31,
In Thousands	2022			2021			2020
Net operating losses	$	40,914		$	38,671		$	33,392
Stock-based compensation		2,950			2,724			2,531
Financing lease obligations		—			3,820			4,574
Operating lease ROU liabilities		2,921			—
Tax credit carry forwards		3,685			3,210			2,577
Capitalized R&D		2,183			—
Compensation		14			514			339
Derivative liability		—			—			703
Other		124			143			391
Gross deferred tax assets		52,791			49,082			44,507
Less valuation allowance		(49,843	)		(45,369	)		(39,898	)
Net deferred tax assets		2,948			3,713			4,609
Fixed assets		(89	)		(3,667	)		(4,609	)
Operating lease ROU assets		(2,859	)		—
Other		—			(46	)		—
Gross deferred tax liabilities		(2,948	)		(3,713	)		(4,609	)
Net deferred tax asset or liability	$	—		$	—		$	—