STOCKHOLDERS' EQUITY (Details 4) (USD $)	3 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Restricted stock and RSUs
Total Shares
Outstanding at the beginning of the period (in shares)	3,978,723	3,007,338
Granted (in shares)	631,059	2,233,287
Issued (in shares)	(890,671)	(465,731)
Cancelled (in shares)	(228,395)	(229,826)
Forfeited (in shares)	(3,536)
Outstanding at the end of the period (in shares)	3,487,180	4,545,068
Shares withdrawn, cancelled or forfeited in period	231,931	229,826
Restricted Shares
Total Shares
Outstanding at the beginning of the period (in shares)	1,265,118	464,610
Granted (in shares)		670,781
Issued (in shares)	(310,320)	(86,727)
Outstanding at the end of the period (in shares)	954,798	1,048,664
Weighted-Average Grant-Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	0.90	1.30
Granted (in dollars per share)		0.64
Issued (in dollars per share)	0.92	1.65
Outstanding at the end of the period (in dollars per share)	0.90	0.85
Restricted Stock Units
Total Shares
Outstanding at the beginning of the period (in shares)	2,713,605	2,542,728
Granted (in shares)	631,059	1,562,506
Issued (in shares)	(580,351)	(379,004)
Cancelled (in shares)	(228,395)	(229,826)
Forfeited (in shares)	(3,536)
Outstanding at the end of the period (in shares)	2,532,382	3,496,404
Weighted-Average Grant-Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	0.89	0.98
Granted (in dollars per share)	1.02	0.68
Issued (in dollars per share)	0.82	0.93
Cancelled (in dollars per share)	0.82	0.93
Forfeited (in dollars per share)	0.70
Outstanding at the end of the period (in dollars per share)	0.94	0.85