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Consolidated Statement of Stockholders' Equity - USD ($)
$ in Thousands
Total
Revision of Prior Period Accounting Standards Update Adjustment [Member]
Common Stock [Member]
Number of Warrants [Member]
Common Stock and Additional Paid-In Capital [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Revision of Prior Period Accounting Standards Update Adjustment [Member]
Beginning balance at Sep. 30, 2019 $ 425,868       $ 238,504 $ 187,364  
Beginning balance (ASU 2018-09 [Member]) at Sep. 30, 2019   $ 259         $ 259
Beginning balance, shares at Sep. 30, 2019     31,413,287 3,600,953      
Stock compensation expense 4,414       4,414    
Repurchased shares (586)   $ (600)   (586)    
Repurchased shares, shares     (142,439)        
Warrants converted to common stock     3,600,953 (3,600,953)      
Restricted shares issued, shares     555,473        
Employee share purchases 440       440    
Employee share purchases, shares     99,644        
Net income (loss) 27,464         27,464  
Ending balance at Sep. 30, 2020 457,859       242,772 215,087  
Ending balance, shares at Sep. 30, 2020     35,526,918        
Stock compensation expense 3,126       3,126    
Repurchased shares (1,486)   $ (1,500)   (1,486)    
Repurchased shares, shares     (155,174)        
Issuance of warrants, net of issuance costs 11,489       11,489    
Issuance of warrants, net of issuance costs, shares       4,899,497      
Restricted shares issued, shares     492,465        
Employee share purchases 471       471    
Employee share purchases, shares     94,550        
Net income (loss) 16,588         16,588  
Ending balance at Sep. 30, 2021 488,047       256,372 231,675  
Ending balance, shares at Sep. 30, 2021     35,958,759 4,899,497      
Stock compensation expense 2,761       2,761    
Repurchased shares (455)   $ (500)   (455)    
Repurchased shares, shares     (147,108)        
Restricted shares issued 100       100    
Restricted shares issued, shares     455,303        
Employee share purchases 399       399    
Employee share purchases, shares     109,943        
Net income (loss) (182,678)         (182,678)  
Ending balance at Sep. 30, 2022 $ 308,174       $ 259,177 $ 48,997  
Ending balance, shares at Sep. 30, 2022     36,376,897 4,899,497