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Condensed Consolidated Statement of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Treasury Stock
Accumulated Other Comprehensive Loss
Accumulated Deficit
Balance (in shares) at Sep. 30, 2020   34,082,406   (547,508,000)    
Balance at Sep. 30, 2020 $ 111,815 $ 34 $ 247,892 $ (3,983) $ (9,782) $ (122,346)
Increase (Decrease) in Stockholders' Equity            
Net income 4,514         4,514
Exercise of stock options, grants of restricted stock awards, and vesting of restricted stock units (in shares)   151,845        
Exercise of stock options, grants of restricted stock awards, and vesting of restricted stock units             197   197      
Taxes paid associated with net settlement of stock compensation awards (in shares)   (7,703)        
Taxes paid associated with net settlement of stock compensation awards (57)   (57)      
Forfeitures of restricted stock awards (in shares)   (13,733)        
Common stock repurchased (in shares)       (309,496,000)    
Common stock repurchased $ (4,103)     $ (4,103)    
Common stock surrendered in the exercise of stock options (in shares) (9,384)     (9,384,000)    
Common stock surrendered in the exercise of stock options $ 0   169 $ (169)    
Balance (in shares) at Dec. 31, 2020   34,212,815   (866,388,000)    
Balance at Dec. 31, 2020 115,063 $ 34 250,002 $ (8,255) (8,886) (117,832)
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)
Increase (Decrease) in Stockholders' Equity            
Net income 3,602         3,602
Exercise of stock options, grants of restricted stock awards, and vesting of restricted stock units (in shares)   131,070        
Exercise of stock options, grants of restricted stock awards, and vesting of restricted stock units             1 $ 1        
Taxes paid associated with net settlement of stock compensation awards (in shares)   (40,239)        
Taxes paid associated with net settlement of stock compensation awards (851)   (851)      
Forfeitures of restricted stock awards (in shares)   (14,855)        
Common stock repurchased (in shares)       (147,185)    
Common stock repurchased $ (2,963)     $ (2,963)    
Common stock surrendered in the exercise of stock options (in shares) (4,678)     (4,678)    
Common stock surrendered in the exercise of stock options $ 0   100 $ (100)    
Stock compensation expense 2,270   2,270      
Foreign currency translation and other 5       (131) 136
Balance (in shares) at Dec. 31, 2021   35,533,071   (2,373,946)    
Balance at Dec. 31, 2021 $ 137,079 $ 36 $ 253,536 $ (39,691) $ (9,142) $ (67,660)