CONSOLIDATED STATEMENTS OF CASH FLOW (UNAUDITED) (Parenthetical)	Aug. 31, 2020	Nov. 30, 2019	[1]	Aug. 31, 2019	Jul. 28, 2017	Apr. 18, 2017
8.5% Convertible Notes
Debt interest rate	8.50%			8.50%
5.0% Convertible Notes
Debt interest rate	5.00%	5.00%		5.00%		5.00%
8.5% Senior Secured Notes
Debt interest rate	8.50%	8.50%		8.50%	8.50%

[1] Derived from audited consolidated financial statements.