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Equity Compensation Restricted Stock Units (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2019
Dec. 31, 2018
2019 Service Year [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted Stock Units outstanding   24,280  
RSUs vested and unearned   0  
RSUs unearned and unvested   24,280  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrument Other than Option, Nonvested, Intrinsic Value   $ 10.77  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   27,760  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value   $ 298,975  
share based compensation awards forfeited   (3,480)  
Share Based Compensation Awards, Units Earned And Converted Into Common Stock   0  
2018 Service Year [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted Stock Units outstanding     15,640
RSUs vested and unearned   5,238  
RSUs unearned and unvested   10,402  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrument Other than Option, Nonvested, Intrinsic Value   $ 16.66  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     20,720
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value   $ 345,195  
share based compensation awards forfeited   (5,080)  
Share Based Compensation Awards, Units Earned And Converted Into Common Stock   0  
2017 Service Year [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted Stock Units outstanding 5,709    
RSUs vested and unearned   0  
RSUs unearned and unvested   5,709  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrument Other than Option, Nonvested, Intrinsic Value   $ 11.92  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 26,900    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value   $ 320,648  
share based compensation awards forfeited   (7,037)  
Share Based Compensation Awards, Units Earned And Converted Into Common Stock   14,154