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Stock-Based Compensation - Activity in the Stock Plan (Details) - shares
1 Months Ended 3 Months Ended 159 Months Ended 207 Months Ended
May 31, 2021
May 31, 2014
Mar. 31, 2022
Mar. 31, 2022
Mar. 31, 2022
Employee Stock Award Plan-2008          
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]          
Beginning balance (in shares)     1,317,819 1,900,000  
Additional shares authorized (in shares) 650,000 1,500,000 0 2,150,000  
Number of awards granted (in shares)     (88,746) (3,539,502)  
Number of awards forfeited or expired (in shares)     24,107 742,682  
Ending balance (in shares)     1,253,180 1,253,180 1,253,180
Employee Stock Award Plan-2008 | Options Awards          
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]          
Number of option awards exercised (in shares)     5,400 1,487,373  
Employee Stock Award Plan-2008 | Unrestricted Stock Awards          
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]          
Number of awards granted (in shares)     0 (10,090)  
Employee Stock Award Plan-2008 | Restricted Stock Awards          
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]          
Number of restricted stock awards vested (in shares)     31,740 249,601  
Director Plan - 2005          
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]          
Beginning balance (in shares)     144,352   300,000
Additional shares authorized (in shares)     0   150,000
Number of awards granted (in shares)     0   (332,378)
Number of awards forfeited or expired (in shares)     0   26,730
Ending balance (in shares)     144,352 144,352 144,352
Director Plan - 2005 | Options Awards          
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]          
Number of option awards exercised (in shares)     0   142,001
Director Plan - 2005 | Restricted Stock Awards          
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]          
Number of restricted stock awards vested (in shares)     0   98,491