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Stock Based Compensation, Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Period options granted to date vest ratably     5 years  
Compensation expense relating to restricted stock $ 52,000 $ 34,000 $ 145,000 $ 67,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 years  
Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value 0 1,000 $ 0 1,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value 0 1,000 0 1,000
Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Payment Arrangement, Expense 52,000 35,000 145,000 68,000
Share-based Payment Arrangement, Expense, Tax Benefit 10,000 $ 7,000 30,000 $ 14,000
Restricted stock compensation costs not yet recognized $ 709,000   $ 709,000  
Compensation costs not yet recognized, period for recognition     4 years 8 months 12 days  
Ownership Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized for issuance (in shares) 200,000   200,000  
2015 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized for issuance (in shares) 450,000   450,000