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Income Taxes Reconciliation of Statutory Rate to Effective Rate (Details)
12 Months Ended
Dec. 31, 2021
Rate
Dec. 31, 2020
Rate
Dec. 31, 2019
Rate
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Statutory tax rate 21.00% 21.00% 21.00%
State income tax, net 3.20% 3.00% 3.60%
Federal tax credits 0.00% 0.00% (3.30%)
Effect of state income tax rate changes 0.00% 0.20% (6.40%)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent (19.80%) (22.10%) (0.60%)
Non-deductible compensation 0.30% (0.60%) 5.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depletion, Percent 0.00% (0.10%) (2.30%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount 0.10% (0.10%) (1.00%)
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent 0.00% 0.00% (0.50%)
Other 0.00% (0.20%) 0.00%
Effective Income Tax Rate Reconciliation, Percent 4.80% 1.10% 5.50%