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Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
May 31, 2019
Mar. 31, 2019
Jan. 31, 2019
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
May 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Approved and authorized maximum number of shares to be issued (in shares)                   2,400,000
Compensation expense related to stock based awards outstanding         $ 1,100 $ 800 $ 1,700 $ 1,100    
Exercise of stock options (in shares)       0 84,705   7,021 231,470    
Proceeds received upon exercise of stock options             $ 35 $ 1,299    
Total unrecognized compensation expense         $ 2,700     $ 2,700    
Share-based compensation cost not yet recognized, period for recognition                 2 years  
Stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Options, expiration period               10 years    
Forfeiture rate               5.50%    
Exercise of stock options (in shares)       0 84,705   7,021 231,470    
Proceeds received upon exercise of stock options         $ 500   $ 100 $ 1,300    
Stock options | Minimum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Options, vesting period               3 years    
Restricted Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Grants in period (in shares)   168,350 16,854              
Grants in period, grant date fair value (in dollars per share)   $ 2.97 $ 4.45              
Independent Directors and Certain Officers and Executives | Restricted Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Grants in period (in shares) 479,590                  
Grants in period, grant date fair value (in dollars per share) $ 1.96                  
Shares earned based on achievement of objective, percent 100.00%                  
Performance period 1 year                  
Independent Director | Restricted Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Grants in period (in shares) 229,590                  
Certain Executives | Restricted Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Grants in period (in shares) 187,500                  
2017 LTIP | Stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Forfeiture rate               3.20%    
Vesting If Performance Target Is Met | Independent Directors and Certain Officers and Executives | Restricted Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Vesting percentage 50.00%                  
Vesting On Second And Third Anniversary Of Grant | Independent Directors and Certain Officers and Executives | Restricted Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Vesting percentage 25.00%