Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity and Stock Based Compensation - Plans and options (Details)

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Stockholders' Equity and Stock Based Compensation - Plans and options (Details) - $ / shares
Dec. 31, 2023
Dec. 31, 2022
Jun. 30, 2018
May 31, 2018
Stock-based compensation        
Common Stock, par value (in dollars per share) $ 0.01 $ 0.01    
Options reserved for future issuance (in shares) 0      
Options outstanding 0 0    
Options exercisable 0 0    
2021 Plan        
Stock-based compensation        
Common Stock, par value (in dollars per share) $ 0.01      
Number of shares of common stock initially available for award 500,000      
Options reserved for future issuance (in shares) 241,068      
2012 Plan        
Stock-based compensation        
Number of shares of common stock initially available for award     1,000,000 600,000
Options reserved for future issuance (in shares) 0   352,158