Financial instruments - Contractually obligated cash flow requirements (Details) $ in Thousands	Nov. 30, 2020 USD ($)
Total	$ 1,616
Within 1 Year	1,084
1 - 2 Years	409
2 - 5 Years	123
Accounts payable and accrued liabilities
Total	888
Within 1 Year	888
Office lease
Total	728
Within 1 Year	196
1 - 2 Years	409
2 - 5 Years	$ 123

Amount of contractual obligation to be paid in fourth and fifth fiscal years following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

No definition available.

Name:	us-gaap_ContractualObligationDueInFourthAndFifthYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant