Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation of Statutory U.S. Federal Rate (Details)

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Income Taxes - Reconciliation of Statutory U.S. Federal Rate (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Percentage of pre-tax income:    
Statutory federal income tax rate 21.00% 21.00%
State taxes, net of federal tax benefit 6.00% 5.00%
Credits 1.00% 0.00%
Change in state tax rate 1.00% (1.00%)
Provision to return (1.00%) 1.00%
Stock based compensation   (1.00%)
Other (3.00%) (1.00%)
Change in valuation allowance (25.00%) (24.00%)
Income taxes provision (benefit) 0.00% 0.00%