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Share-Based Compensation and Stock Repurchases (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended 75 Months Ended
Mar. 05, 2020
Apr. 30, 2021
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Mar. 31, 2023
Mar. 10, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Repurchase program, amount authorized     $ 26,000,000.0     $ 26,000,000.0  
Number of Stock Options, Granted     0        
Stock Option [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Compensation expense     $ 9,000 $ 53,000      
Unrecognized estimated compensation cost related to non-vested stock options granted     $ 27,000     27,000  
Recognition period of unrecognized compensation cost     9 months        
Share price     $ 3.25        
Intrinsic unrealized value of all options outstanding, vested and expected to vest          
Minimum [Member] | 2020 Stock Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period of stock options and RSU     1 year        
Maximum [Member] | 2020 Stock Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period of stock options and RSU     4 years        
Stock option expiry period     5 years        
Class A Nonvoting Common Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share price           $ 13.39  
Shares repurchased plan, shares           1,792,819  
Class A [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares repurchased plan, shares     0 0      
Class A [Member] | 2020 Stock Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common Stock authorized for issuance     1,250,000     1,250,000  
Common Stock shares remaining for future issuances     234,955     234,955  
Class A [Member] | Maximum [Member] | 2020 Stock Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Additional shares authorized     316,902        
$25 Million Stock Repurchase Program [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Repurchase program, amount authorized             $ 25,000,000.0
$25 Million Stock Repurchase Program [Member] | Class A Nonvoting Common Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share price $ 7.30            
Shares repurchased plan, shares 25,000            
Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Compensation expense     $ 434,000 $ 363,000      
Unrecognized estimated compensation cost related to non-vested stock options granted     $ 2,800,000     $ 2,800,000  
Vesting period of stock options and RSU     1 year 6 months 21 days        
Number of options, Granted     1,561,690   295,549    
Executive Officer [Member] | Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period of stock options and RSU     4 years        
Executive Officer [Member] | Restricted Stock Units (RSUs) [Member] | Tranche One [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage   75.00%          
Executive Officer [Member] | Restricted Stock Units (RSUs) [Member] | Tranche Two [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage   25.00%          
Directors [Member] | Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of options, Granted     339,438   129,796    
Management [Member] | Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period of stock options and RSU     4 years        
Percentage of shares vested     25.00%        
Number of options, Granted     1,222,252   165,753    
Non-employee Director [Member] | Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period of stock options and RSU     1 year        
Chief Executive Officer [Member] | Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period of stock options and RSU     4 years        
Chief Executive Officer [Member] | Restricted Stock Units (RSUs) [Member] | Tranche One [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage   50.00%          
Chief Executive Officer [Member] | Restricted Stock Units (RSUs) [Member] | Tranche Two [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage   50.00%