Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

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Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating Loss Carryforwards [Line Items]      
Unrecognized tax benefits that would affect our effective tax rate if recognized $ 258,000 $ 0 $ 73,000
Increase in unrecognized tax benefits due to state taxes 258,000    
Decrease in unrecognized tax benefits due to state taxes   73,000 129,000
Valuation allowance 1,644,000 $ 4,352,000 $ 4,852,000
Federal and state income tax $ 214,500,000    
CARES Act      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryback period 5 years    
Federal      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforwards $ 12,300,000    
Federal | California      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforwards 152,300,000    
Federal | Illinois      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforwards 62,100,000    
State      
Operating Loss Carryforwards [Line Items]      
Low income housing tax credit $ 0