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Stock-based Compensation - Summary of plans (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Jul. 25, 2018
Feb. 28, 2019
Jan. 31, 2019
Feb. 28, 2018
Jan. 31, 2018
Apr. 30, 2017
Mar. 31, 2016
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Jul. 24, 2018
Stock-based Compensation                      
Stock based compensation expense related to shares issued for services               $ 52 $ 45    
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)               92 32    
2008 LTIP | Chief Executive Officer | Restricted stock                      
Stock-based Compensation                      
Restricted stock award (in shares)             120,483        
Stock based compensation expense (reversal of expense)               3 26    
2008 LTIP | Chief Executive Officer | Restricted stock | Two-year period                      
Stock-based Compensation                      
Restricted stock award (in shares)             100,000        
Vesting period of stock award             2 years        
2008 LTIP | Chief Executive Officer | Restricted stock | Three-year period                      
Stock-based Compensation                      
Restricted stock award (in shares)             20,483        
Vesting period of stock award             3 years        
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                    
2018 LTIP | Restricted stock                      
Stock-based Compensation                      
Unrecognized compensation cost, restricted stock               $ 505      
Period for recognizing unrecognized compensation cost               1 year 11 months 1 day      
2018 LTIP | Stock Options                      
Stock-based Compensation                      
Stock based compensation expense (reversal of expense)               $ 9 $ 9    
Period for recognizing unrecognized compensation cost               1 year 10 months 24 days      
Number of stock options granted (in shares)               0 0    
2018 LTIP | Employees | Restricted stock                      
Stock-based Compensation                      
Stock based compensation expense (reversal of expense)               $ 22      
2018 LTIP | Employees | Restricted stock | Two-year period                      
Stock-based Compensation                      
Restricted stock award (in shares)   428,796                  
Vesting period of stock award   2 years                  
2018 LTIP | Directors | Common Stock                      
Stock-based Compensation                      
Shares issued for services     42,168   18,906            
Stock based compensation expense related to shares issued for services               $ 52 $ 45