v3.23.1
Stock Based Compensation - Stock option activity under the stock option plans (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Oct. 11, 2022
Oct. 10, 2022
Apr. 07, 2021
Number of Shares          
Options outstanding at the beginning 123,850        
Options granted 538,000        
Stock option grant authorized for service on a committee of the Board of Directors     1,375,000 625,000 625,000
Less options forfeited 0        
Less options expired/cancelled 0        
Less options exercised 0        
Options outstanding at the end 661,850 123,850      
Options exercisable at the end 394,388        
Weighted-Average Exercise Price          
Options outstanding at the beginning (in dollars per share) $ 9.84        
Options granted (in dollars per share) 6.08        
Less options forfeited (in dollars per share) 0        
Less options expired/cancelled (in dollars per share) 0        
Less options exercised (in dollars per share) 0        
Options outstanding at the end (in dollars per share) 7.27 $ 9.84      
Options exercisable at the end (in dollars per share) $ 9.84        
Weighted-Average Remaining Contractual Term (Years)          
Options granted (in years) 9 years 9 months 18 days        
Options outstanding at the end (in years) 9 years 6 months 9 years      
Options exercisable at the end (in years) 9 years 3 months 18 days        
Aggregate Intrinsic Value          
Options outstanding at the end (in dollars) $ 0 $ 0      
Options exercisable at the end (in dollars) $ 0