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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Beginning Balance (in shares) at Sep. 30, 2020   12,404,000    
Beginning Balance at Sep. 30, 2020 $ 53,437 $ 12 $ 85,868 $ (32,443)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Expense related to director restricted stock unit (in shares)   78,000    
Expense related to director restricted stock units 349   349  
Expense related to employee stock-based compensation 968   968  
Exercise of stock options (in shares)   63,000    
Exercise of stock options 231 $ 1 230  
Net income 7,261     7,261
Ending Balance (in shares) at Jun. 30, 2021   12,545,000    
Ending Balance at Jun. 30, 2021 62,246 $ 13 87,415 (25,182)
Beginning Balance (in shares) at Mar. 31, 2021   12,545,000    
Beginning Balance at Mar. 31, 2021 58,893 $ 13 86,942 (28,062)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Expense related to director restricted stock units 117   117  
Expense related to employee stock-based compensation 356   356  
Net income 2,880     2,880
Ending Balance (in shares) at Jun. 30, 2021   12,545,000    
Ending Balance at Jun. 30, 2021 $ 62,246 $ 13 87,415 (25,182)
Beginning Balance (in shares) at Sep. 30, 2021 12,714,000 12,714,000    
Beginning Balance at Sep. 30, 2021 $ 65,608 $ 13 87,893 (22,298)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Expense related to director restricted stock units 486   486  
Expense related to employee stock-based compensation 1,466   1,466  
Common stock surrendered for the exercise of stock options (in shares)   (31,000)    
Common stock surrendered for the exercise of stock options $ 281   281  
Exercise of stock options (in shares) 224,000 224,000    
Exercise of stock options $ 343   343  
Exercise of stock warrants (in shares)   54,000    
Exercise of stock warrants 200   200  
Net income $ 19,846     19,846
Ending Balance (in shares) at Jun. 30, 2022 12,961,000 12,961,000    
Ending Balance at Jun. 30, 2022 $ 87,668 $ 13 90,107 (2,452)
Beginning Balance (in shares) at Mar. 31, 2022   12,794,000    
Beginning Balance at Mar. 31, 2022 82,361 $ 13 89,664 (7,316)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Expense related to director restricted stock units 162   162  
Expense related to employee stock-based compensation 481   481  
Common stock surrendered for the exercise of stock options (in shares)   (31,000)    
Common stock surrendered for the exercise of stock options 281   281  
Exercise of stock options (in shares)   198,000    
Exercise of stock options 81   81  
Net income $ 4,864     4,864
Ending Balance (in shares) at Jun. 30, 2022 12,961,000 12,961,000    
Ending Balance at Jun. 30, 2022 $ 87,668 $ 13 $ 90,107 $ (2,452)