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Equity Incentive Plan (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2020
May 31, 2020
2020 Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Issuance of Common stock             700,000
Common Stock, Capital Shares Reserved for Future Issuance 488,985   488,985        
Restricted Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period     5 years        
Recognized share based compensation $ 800 $ 800 $ 2,600 $ 2,400      
Unrecognized compensation, other than options 10,000   $ 10,000        
Unrecognized compensation recognition period     3 years 6 months        
Fair value inputs forfeiture rate     0.00%        
Intrinsic value of restricted shares     $ 1,800 1,600      
Restricted Stock [Member] | Maximum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Intrinsic value of restricted shares 100 100          
Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period     3 years     3 years  
Recognized share based compensation (100)   $ 100        
Unrecognized compensation, other than options 200   $ 200        
Unrecognized compensation recognition period     1 year 4 months 24 days        
Performance Units And Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period     3 years        
Recognized share based compensation 100 $ 400 $ 800 $ 1,100      
Unrecognized compensation, other than options $ 3,500   $ 3,500        
Unrecognized compensation recognition period     3 years 6 months        
Fair value inputs forfeiture rate     0.00%        
Amortization period of compensation expense     5 years        
Expected term (years)     2 years 10 months 24 days 2 years 10 months 24 days 2 years 10 months 24 days    
Volatility     33.90% 18.40% 19.70%    
Risk-free rate     0.20% 1.30% 2.50%    
Performance Units And Shares [Member] | 3 Year Performance period completed              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period     3 years        
Vesting percentage     50.00%        
Performance Units And Shares [Member] | 3 Year Performance period to be completed              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period     3 years        
Vesting percentage     50.00%        
Performance Units And Shares [Member] | Maximum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period     5 years