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Consolidated Balance Sheets (Parenthetical) - USD ($)
shares in Thousands, $ in Thousands
Jun. 30, 2018
Sep. 30, 2017
Current assets:    
Restricted cash $ 6,290  
Allowance, accounts receivable $ 3,668 $ 3,776
Stockholders' equity:    
Preferred stock, par value $ 0.003 $ 0.003
Preferred stock, shares authorized 10,000 10,000
Preferred stock, shares issued 0 0
Common stock, par value $ 0.001455 $ 0.001455
Common stock, shares authorized 150,000 150,000
Common stock, shares issued 72,960 72,960
Treasury stock, shares 11,282 11,739
Treasury stock held for deferred compensation, shares 202 186