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Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Treasury Stock
Retained Earnings
Balance at Mar. 31, 2019 $ 104,885 $ 34,660 $ (70,459) $ 140,684
Balance (in shares) at Mar. 31, 2019   7,910    
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of restricted stock awards (in shares)   39    
Exercise of stock options 5 $ 5    
Exercise of stock options (in shares)   2    
Cancellation of restricted stock awards (in shares)   (25)    
Share-based compensation 148 $ 148    
Treasury stock purchases (216)   (216)  
Treasury stock purchases (in shares)   (24)    
Net income 1,170     1,170
Balance at Dec. 31, 2019 105,992 $ 34,813 (70,675) 141,854
Balance (in shares) at Dec. 31, 2019   7,902    
Balance at Sep. 30, 2019 105,833 $ 34,749 (70,459) 141,543
Balance (in shares) at Sep. 30, 2019   7,925    
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Exercise of stock options 5 $ 5    
Exercise of stock options (in shares)   1    
Share-based compensation 59 $ 59    
Treasury stock purchases (216)   (216)  
Treasury stock purchases (in shares)   (24)    
Net income 311     311
Balance at Dec. 31, 2019 105,992 $ 34,813 (70,675) 141,854
Balance (in shares) at Dec. 31, 2019   7,902    
Balance at Mar. 31, 2020 107,579 $ 34,867 (71,438) 144,150
Balance (in shares) at Mar. 31, 2020   7,806    
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of restricted stock awards (in shares)   14    
Share-based compensation 147 $ 147    
Treasury stock purchases (748)   (748)  
Treasury stock purchases (in shares)   (94)    
Net income 6,482     6,482
Balance at Dec. 31, 2020 113,460 $ 35,014 (72,186) 150,632
Balance (in shares) at Dec. 31, 2020   7,726    
Balance at Sep. 30, 2020 110,144 $ 34,964 (71,667) 146,847
Balance (in shares) at Sep. 30, 2020   7,787    
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of restricted stock awards (in shares)   3    
Share-based compensation 50 $ 50    
Treasury stock purchases (519)   (519)  
Treasury stock purchases (in shares)   (64)    
Net income 3,785     3,785
Balance at Dec. 31, 2020 $ 113,460 $ 35,014 $ (72,186) $ 150,632
Balance (in shares) at Dec. 31, 2020   7,726