Note 6 - Other Assets - Carrying Amounts of Other Assets (Details) - USD ($) $ in Thousands	Feb. 29, 2024	Nov. 30, 2023
Interest receivable	$ 1,220	$ 99
Prepaid expenses	853	1,125
Other Assets, Current	2,389	1,470
Other long-term assets:
Marketable equity securities	2,413	2,102
Office equipment	136	141
Other Assets, Noncurrent	3,259	3,000
Other Noncurrent Assets [Member]
Other long-term assets:
Right-of-use assets	710	757
Nonrelated Party [Member]
Accounts receivable	132	43
Related Party [Member]
Accounts receivable	$ 184	$ 203