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Stock-based Payments and Director Fees - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Aug. 01, 2019
Apr. 01, 2019
Jul. 31, 2018
Jul. 24, 2017
Aug. 17, 2016
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Management fees           $ 1,800,000        
Annual retainer amount             $ 75,000      
Restricted stock | Employees                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of restricted stock awards issued to independent directors (in shares) 79,000   36,500 39,000            
Vesting period           3 years        
2014 Director Equity Plan                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Annual Retainer Received In Shares   40.00%       50.00%        
Annual Retainer Received In Cash   60.00%       50.00%        
Vesting period           1 year        
2014 Director Equity Plan | Restricted stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Annual Retainer Received In Shares And Cash Amount   $ 100,000       $ 75,000        
Long term incentive plan | Restricted stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of shares forfeited (in shares)                 2,666  
Long term incentive plan | Restricted stock | Employees                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of shares forfeited (in shares)               333    
Long term incentive plan | Initial public offering | Restricted stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of restricted stock awards issued to independent directors (in shares)           2,000        
Vesting period           1 year        
Management fee                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Amount of expense recognized           $ 0        
Employee And Service Provider Grants | Restricted stock | Employees                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of restricted stock awards issued to independent directors (in shares)         153,000          
Employee And Service Provider Grants | Long term incentive plan | Restricted stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of shares forfeited (in shares)                   4,000
Employee And Service Provider Grants Third Option | Long term incentive plan | Restricted stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of shares forfeited (in shares)           2,500