Condensed Consolidated Balance Sheet (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Jan. 31, 2012	Jul. 31, 2011
Allowance for doubtful accounts	$ 2,267	$ 2,897
Accumulated depreciation	$ 21,993	$ 21,083
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	300,000	300,000
Common stock, shares issued	33,008	32,432
Common stock, votes per share	1	1
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Treasury stock, shares outstanding	1,000	1,000
Series E Preferred Stock [Member]
Preferred stock, shares authorized	3	3
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Series F Preferred Stock [Member]
Preferred stock, shares authorized	100	100
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0