XML 93 R47.htm IDEA: XBRL DOCUMENT v3.22.0.1
Income Taxes - Reconciliation of the Federal Statutory Income Tax Rate to the Effective Tax Rate (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Income Tax Disclosure [Abstract]    
Taxes at U.S. statutory rate 21.00% 21.00%
Changes from statutory rate:    
State taxes, net of federal benefit 8.30% 7.80%
Tax credits 4.10% 3.80%
Share-based compensation (1.00%) (0.30%)
Change in valuation allowance (32.40%) (32.30%)
Effective income tax rate 0.00% 0.00%