Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements Of Cash Flows (Parenthetical)

v2.4.0.6
Condensed Consolidated Statements Of Cash Flows (Parenthetical)
Feb. 29, 2012
Feb. 28, 2011
Condensed Consolidated Statements Of Cash Flows [Abstract]    
Interest rate on repurchase of Convertible Notes 2.00% 2.00%