EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Numerator:
Net (loss) income and comprehensive (loss) income	$ (6,388)	$ 794
Denominator:
Weighted average common shares outstanding	66,646,000	65,043,000
(Loss) Income per common share - basic
Net (loss) income and comprehensive (loss) income (in dollars per share)	$ (0.10)	$ 0.01
Numerator:
Net (loss) income and comprehensive (loss) income	$ (6,388)	$ 794
Denominator:
Weighted average common shares outstanding	66,646,000	65,043,000
Effect of dilutive securities:
Restricted shares, RSU's and options (in shares)		295,000
Dilutive potential common shares	66,646,000	65,338,000
(Loss) Income per common share - dilutive
Net (loss) income and comprehensive (loss) income (in dollars per share)	$ (0.10)	$ 0.01
Anti-dilutive securities excluded from calculation of diluted loss per share (in shares)	4,283,975
Securities excluded from computation of diluted income per share as their exercise prices were out-of-the-money (in shares)		4,211,204
Shares Reserved For Future Issuance
Stock options granted under the incentive plans reserved for future issuance (in shares)	796,794
Shares of common stock issuable upon the vesting of RSUs	2,532,382
Shares of common stock available for future issuance under the 2004 Stock Incentive Plan	3,411,241