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Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 3 months ended Dec. 31, 2015 - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Beginning Balance at Sep. 30, 2015 $ 283,645 $ 26 $ 234,478 $ 75,433 $ (26,292)
Beginning Balance, Shares at Sep. 30, 2015 25,562,994 25,562,994      
Net income $ 889     889  
Purchase of treasury stock (841)       (841)
Shares issued pursuant to employee stock purchase plan 355   355    
Shares issued pursuant to employee stock purchase plan, Shares   29,560      
Shares issued upon vesting of equity awards, net of tax withholding (80)   (80)    
Shares issued upon vesting of equity awards, net of tax withholding, Shares   9,087      
Shares issued upon exercise of stock options 123   123    
Shares issued upon exercise of stock options, Shares   14,849      
Stock-based compensation 1,258   1,258    
Stock-based compensation, Shares   31,329      
Stock option tax benefit, net of shortfalls (223)   (223)    
Ending Balance at Dec. 31, 2015 $ 285,126 $ 26 $ 235,911 $ 76,322 $ (27,133)
Ending Balance, Shares at Dec. 31, 2015 25,647,819 25,647,819