EARNINGS (LOSS) PER COMMON SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Reconciliation of the diluted weighted average shares
Basic weighted average shares	32,429,000	32,196,000	32,129,000
Effect of potential dilutive securities:
Warrants (in shares)	7,189,000
Stock options and restricted share awards	1,340,000
Diluted weighted average shares	40,958,000	32,196,000	32,129,000
Net (earnings) loss	$ (10,012)	$ 27,310	$ 112,306
Warrants
Effect of potential dilutive securities:
Antidilutive securities (in shares)		11,100,000	11,100,000
Stock options and restricted share awards
Effect of potential dilutive securities:
Antidilutive securities (in shares)	1,200,000	5,100,000	3,000,000