CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data	Apr. 30, 2011	Jul. 31, 2010
CONDENSED CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance (in dollars)	$ 5,433	$ 6,253
Notes receivable, trade, allowance (in dollars)	77	135
Intangible assets, accumulated amortization (in dollars)	7,592	5,569
Notes receivable, trade, allowance (in dollars)	$ 1,181	$ 1,304
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized shares	5,000	5,000
Preferred stock, issued shares	0	0
Preferred stock, outstanding shares	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	100,000	100,000
Common stock, issued shares	48,502	43,558
Common stock, outstanding shares	48,475	43,531