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Consolidated Statements of Shareholders' Equity - USD ($)
$ in Thousands
Total
Stock Options
Common Stock
Common Stock
Stock Options
Retained Earnings
Accumulated Other Compre-hensive Income (Loss)
Balance at beginning of period (in shares) at Sep. 30, 2020     8,310,793      
Balance at beginning of period at Sep. 30, 2020 $ 187,630   $ 42,396   $ 145,173 $ 61 [1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 14,541       14,541  
Other comprehensive income 60         60
Repurchase of common stock (in shares)     (2,900)      
Repurchase of common stock $ (58)   $ (58)      
Exercise of stock options (in shares) 53,564   53,564      
Exercise of stock options $ 519   $ 519      
Common stock dividends (4,241)       (4,241)  
Stock option compensation expense   $ 92   $ 92    
Balance at end of period (in shares) at Mar. 31, 2021     8,361,457      
Balance at end of period at Mar. 31, 2021 198,543   $ 42,949   155,473 121 [1]
Balance at beginning of period (in shares) at Dec. 31, 2020     8,317,793      
Balance at beginning of period at Dec. 31, 2020 193,325   $ 42,480   150,801 44 [1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 7,251       7,251  
Other comprehensive income 77         77
Exercise of stock options (in shares)     43,664      
Exercise of stock options 423   $ 423      
Common stock dividends (2,579)       (2,579)  
Stock option compensation expense   46   46    
Balance at end of period (in shares) at Mar. 31, 2021     8,361,457      
Balance at end of period at Mar. 31, 2021 198,543   $ 42,949   155,473 121 [1]
Balance at beginning of period (in shares) at Sep. 30, 2021     8,355,469      
Balance at beginning of period at Sep. 30, 2021 206,899 [2]   $ 42,673   164,167 59 [1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 10,812       10,812  
Other comprehensive income (166)         (166)
Repurchase of common stock (in shares)     (77,113)      
Repurchase of common stock $ (2,149)   $ (2,149)      
Exercise of stock options (in shares) 27,470   27,470      
Exercise of stock options $ 332   $ 332      
Common stock dividends (3,591)       (3,591)  
Stock option compensation expense   132   132    
Balance at end of period (in shares) at Mar. 31, 2022     8,305,826      
Balance at end of period at Mar. 31, 2022 212,269   $ 40,988   171,388 (107) [1]
Balance at beginning of period (in shares) at Dec. 31, 2021     8,348,821      
Balance at beginning of period at Dec. 31, 2021 210,375   $ 42,436   167,897 42 [1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 5,327       5,327  
Other comprehensive income (149)         (149)
Repurchase of common stock (in shares)     (61,565)      
Repurchase of common stock (1,716)   $ (1,716)      
Exercise of stock options (in shares)     18,570      
Exercise of stock options 202   $ 202      
Common stock dividends (1,836)       (1,836)  
Stock option compensation expense   $ 66   $ 66    
Balance at end of period (in shares) at Mar. 31, 2022     8,305,826      
Balance at end of period at Mar. 31, 2022 $ 212,269   $ 40,988   $ 171,388 $ (107) [1]
[1] All amounts are net of income taxes.
[2] Derived from audited consolidated financial statements.