Note 15 - Discontinued Operations (Details Textual) - USD ($) $ in Thousands	Jul. 27, 2018	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Financing Receivable, after Allowance for Credit Loss, Total		$ 96,016	$ 92,679	$ 89,459	$ 0
Note Receivable Upon Completion of Galore Creek Project Pre-feasibility [Member]
Financing Receivable, after Allowance for Credit Loss, Total	$ 75,000
Note Receivable Upon Completion of Galore Creek Project Feasibility [Member]
Financing Receivable, after Allowance for Credit Loss, Total	25,000
Note Receivable Upon Approval of Galore Creek Project Construction Plan [Member]
Financing Receivable, after Allowance for Credit Loss, Total	$ 75,000
Galore Creek [Member]
Discontinued Operation, Ownership Percentage, Sold	50.00%
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates, Total	$ 100,000