Note 5 - Other Assets - Carrying Amounts of Other Assets (Details) - USD ($) $ in Thousands	Aug. 31, 2024	Nov. 30, 2023
Interest receivable	$ 919	$ 99
Prepaid expenses	381	1,125
Other Assets, Current	1,536	1,470
Marketable equity securities	3,043	$ 2,102
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]		Other Assets, Noncurrent
Right-of-use assets	952	$ 757
Office equipment	124	141
Other Assets, Noncurrent	4,119	3,000
Nonrelated Party [Member]
Accounts receivable	61	43
Related Party [Member]
Accounts receivable	$ 175	$ 203