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Stock-based Compensation - Summary of plans (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Jul. 25, 2018
Feb. 29, 2020
Feb. 28, 2019
Jan. 31, 2019
Feb. 28, 2018
Apr. 30, 2017
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
2008 LTIP                    
Stock-based Compensation                    
Shares authorized to be granted under stock compensation plan 2,000,000                  
2008 LTIP | Cash-settled restricted stock units                    
Stock-based Compensation                    
Stock based compensation expense (reversal of expense)                 $ 147 $ (54)
2008 LTIP | Stock Options                    
Stock-based Compensation                    
Number of stock options granted (in shares)             0 0    
2008 LTIP | Chief Executive Officer | Cash-settled restricted stock units | Two-year period                    
Stock-based Compensation                    
Restricted stock award (in shares)         97,195 129,270        
Vesting period of stock award         2 years 2 years        
2018 LTIP                    
Stock-based Compensation                    
Shares authorized to be granted under stock compensation plan                   1,293,109
Contractual term of option awards 10 years                  
Shares issued for services                 458,932  
Shares available for awards                 834,177  
2018 LTIP | Stock Options                    
Stock-based Compensation                    
Stock based compensation expense (reversal of expense)             $ 9 $ 9    
Period for recognizing unrecognized compensation cost             11 years      
2018 LTIP | Employees | Restricted stock                    
Stock-based Compensation                    
Stock based compensation expense (reversal of expense)             $ 71      
Unrecognized compensation cost, restricted stock             $ 430      
Period for recognizing unrecognized compensation cost             23 months      
2018 LTIP | Employees | Restricted stock | Two-year period                    
Stock-based Compensation                    
Restricted stock award (in shares)   140,218 428,797              
Vesting period of stock award   2 years 2 years              
2018 LTIP | Directors | Common Stock                    
Stock-based Compensation                    
Restricted stock award (in shares)   30,930   42,168            
Stock based compensation expense (reversal of expense)             $ 45 $ 52