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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Cumulative Effect, Period of Adoption, Adjustment
Common Stock
Additional Paid-in Capital
Additional Paid-in Capital
Cumulative Effect, Period of Adoption, Adjustment
Treasury Stock
Accumulated Other Comprehensive Loss
Accumulated Deficit
Accumulated Deficit
Cumulative Effect, Period of Adoption, Adjustment
Balance (in shares) at Sep. 30, 2018     32,774,118     0      
Balance at Sep. 30, 2018 $ 129,654 $ 730 $ 33 $ 236,115 $ 0 $ 0 $ (6,449) $ (100,045) $ 730
Increase (Decrease) in Stockholders' Equity                  
Net income (loss) (19,260)             (19,260)  
Exercise of common stock options, grants of restricted stock awards, and vesting of restricted stock units (in shares)     953,066            
Exercise of common stock options, grants of restricted stock awards, and vesting of restricted stock units         590   $ 1 589          
Tax settlements associated with stock compensation expense (in shares)     (6,906)            
Taxes paid associated with net settlement of stock compensation awards (44)     (44)          
Forfeiture of restricted stock awards (in shares)     (33,163)            
Stock compensation expense 6,026     6,026          
Defined benefit pension plan—unrecognized amounts, net of taxes (540)           (540)    
Foreign currency translation and other (981)           (984) 3  
Balance (in shares) at Sep. 30, 2019     33,687,115     0      
Balance at Sep. 30, 2019 116,175   $ 34 242,686   $ 0 (7,973) (118,572)  
Increase (Decrease) in Stockholders' Equity                  
Net income (loss) (3,774)             (3,774)  
Exercise of common stock options, grants of restricted stock awards, and vesting of restricted stock units (in shares)     494,683            
Exercise of common stock options, grants of restricted stock awards, and vesting of restricted stock units         111     111          
Tax settlements associated with stock compensation expense (in shares)     (84,392)            
Taxes paid associated with net settlement of stock compensation awards (594)     (594)          
Forfeiture of restricted stock awards (in shares)     (15,000)            
Common stock repurchases (in shares)           (547,508)      
Common stock repurchases (3,983)         $ (3,983)      
Stock compensation expense 5,689     5,689          
Defined benefit pension plan—unrecognized amounts, net of taxes (2,293)           (2,293)    
Foreign currency translation and other 484           484    
Balance (in shares) at Sep. 30, 2020     34,082,406     (547,508)      
Balance at Sep. 30, 2020 $ 111,815   $ 34 247,892   $ (3,983) (9,782) (122,346)  
Increase (Decrease) in Stockholders' Equity                  
Accounting Standards Update Accounting Standards Update 2016-02 [Member]                
Net income (loss) $ 50,949             50,949  
Exercise of common stock options, grants of restricted stock awards, and vesting of restricted stock units (in shares)     1,605,618            
Exercise of common stock options, grants of restricted stock awards, and vesting of restricted stock units         445   $ 1 444          
Tax settlements associated with stock compensation expense (in shares)     (217,196)            
Taxes paid associated with net settlement of stock compensation awards (3,915)     (3,915)          
Forfeiture of restricted stock awards (in shares)     (13,733)            
Common stock repurchases (in shares)           (1,591,963)      
Common stock repurchases $ (31,143)         $ (31,143)      
Common stock surrendered in the exercise of stock options (in shares) (82,612)         (82,612)      
Common stock surrendered in the exercise of stock options $ 0     1,502   $ (1,502)      
Stock compensation expense 6,094     6,094          
Defined benefit pension plan—unrecognized amounts, net of taxes 170           170    
Foreign currency translation and other 600           601 (1)  
Balance (in shares) at Sep. 30, 2021     35,457,095     (2,222,083)      
Balance at Sep. 30, 2021 $ 135,015   $ 35 $ 252,017   $ (36,628) $ (9,011) $ (71,398)