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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2022
Income Tax Disclosure [Abstract]  
Provision for Income Taxes Based on Losses from Continuing Operations
The provision for income taxes based on losses from continuing operations consists of the following at December 31:

Years ended December 31,
(in thousands)20222021
Current:
  State$— $
Total current provision
— 
Deferred:
  Federal19,054 (5,551)
  State4,902 (531)
Total deferred (benefit) expense 23,956 (6,082)
Valuation allowance(23,956)6,081 
Total income tax provision$— $— 
Schedule of Significant Components of the Company’s Taxes and the Rates
Significant components of the Company’s taxes and the rates as of December 31 are shown below:
Years ended December 31,
(in thousands, except percentages)20222021
Tax computed at the federal statutory rate$(8,128)21 %$(5,941)21 %
State tax, net of federal tax benefit(518)%(233)%
Permanent items32,369 (84)%62 — %
Stock based compensation553 (1)%325 (1)%
Research and development credits(319)%(366)%
Return to provision and true ups— — %— — %
Other(1)— %72 — %
Valuation allowance increase (decrease)(23,956)62 %6,081 (22)%
Provision for income taxes$— — %$— — %
Schedule of Significant Components of the Company’s Deferred Tax Assets
Significant components of the Company’s deferred tax assets and liabilities from federal and state income taxes as of December 31 are shown below (in thousands):
 Years ended December 31,
(in thousands)20222021
Deferred tax assets:  
Tax loss carryforwards$20,289 $17,506 
Research and development credits and other tax credits2,743 2,226 
Stock-based compensation1,317 962 
Capitalized research and development4,794 — 
Other1,431 1,750 
Total deferred tax assets30,574 22,444 
Deferred tax liabilities:
Operating lease right-of-use assets(492)(611)
Other— — 
Total deferred tax liabilities(492)(611)
Net deferred tax assets before valuation allowance30,082 21,833 
Valuation allowance(30,082)(21,833)
Net deferred tax asset$— $—