CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Aug. 31, 2020	Nov. 30, 2019	[1]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	415,000,000	415,000,000
Common stock, shares issued (in shares)	159,263,140	158,365,275
Common stock, shares outstanding (in shares)	158,655,140	157,757,275
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	40,000,000	40,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Treasury stock (in shares)	608,000	608,000
5.0% Convertible Notes
Debt interest rate	5.00%	5.00%
8.5% Senior Secured Notes
Debt interest rate	8.50%	8.50%

[1] Derived from audited consolidated financial statements.