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Stock-based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Dec. 31, 2018
Restricted Stock [Member]      
Stock-based Compensation [Abstract]      
Unvested restricted stock outstanding (in shares) 0 0  
2018 LTIP [Member]      
Stock-based Compensation [Abstract]      
Contractual term of option awards   10 years  
Maximum number of shares that can be awarded (in shares)     1,293,109
Aggregate number of shares awarded to date under the plan (in shares) 533,169 533,169  
Shares available for awards (in shares) 759,940 759,940  
2018 LTIP [Member] | Chief Executive Officer [Member] | Restricted Stock [Member]      
Stock-based Compensation [Abstract]      
Restricted stock awards issued (in shares) 64,516    
Restricted stock awards vested (in shares) 64,516    
Restricted stock awards vested, cost $ 200    
Restricted stock awards cancelled (in shares) 21,354