SHARE-BASED PAYMENTS - Additional Information (Detail) (USD $)	12 Months Ended					12 Months Ended												12 Months Ended
	Jul. 31, 2012 Y	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009	Jul. 31, 2012 1999 Plan [Member]	Jul. 31, 2012 2005 Plan [Member]	Jul. 31, 2012 Director Plan [Member]	Jul. 31, 2012 Options Held [Member]	Jul. 31, 2012 1995 Stock Option Plan [Member]	Jul. 31, 2011 1995 Stock Option Plan [Member]	Jul. 31, 2010 1995 Stock Option Plan [Member]	Dec. 31, 2009 1995 Stock Option Plan [Member]	Jul. 31, 2009 1995 Stock Option Plan [Member]	Jul. 31, 2002 1995 Stock Option Plan [Member]	Jul. 31, 2012 Minimum [Member] Y	Jul. 31, 2012 Maximum [Member] Y	Jul. 31, 2012 Stock Option Granted [Member] Y	Jul. 31, 2012 Year 2010 [Member]	Dec. 08, 2010 Year 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable terms, maximum															1	3
Contractual terms ,share options granted																	7
Exercisable rate of options granted	25.00%
2010 Plan number of shares pursuant to stock options granted	1,252,000																	5,000,000
2010 Plan additional shares of Common Stock																			2,922,258
Common Stock shares available for future issuance					200,000	0			222,000									4,745,581
Common stock issued pursuant to awards granted						200,000
Number of shares pursuant to stock options granted							20,000	2,400				600,000		300,000
Options vested exercisable ratio							0.028%
Plan contractual terms						10 years
Common stock purchase price as a percentage of market value	85.00%
Shares issued under plan									23,000	34,000	39,000		35,000
Weighted-average grant date fair value of employee stock options granted	$ 1.98	$ 2.97	$ 3.73	$ 3.22
Unrecognized share-based compensation	$ 2,000,000
Weighted average period of stock options	1.9
Intrinsic value of options exercised		10,000	100,000	0
Stock options vested and expected to vest	2,600,000
Aggregate intrinsic value stock options	5,000
Weighted-average remaining contractual term	4 years 2 months 23 days
Non vested stock compensation expense	1,600,000	1,600,000	1,500,000	1,900,000
Grant date fair value of nonvested stock	2,100,000	1,500,000	1,900,000	1,000,000
Unrecognized compensation cost related to nonvested stock	$ 800,000