Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data	Jun. 30, 2011	Sep. 30, 2010
Current assets:
Allowance for doubtful accounts receivable	$ 870	$ 732
Shareholders' equity:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	80,000	80,000
Common stock, shares issued	45,721	45,721
Treasury stock, shares	2,150	2,150