Note 7 - Marketable Debt Securities - Schedule of Fair Value Measurement (Details) - USD ($) $ in Thousands	May 31, 2026	Nov. 30, 2025
Fair value	$ 1,002	$ 1,754
Corporate Debt Securities [Member]
Fair value	0	748
US Treasury Securities [Member]
Fair value	1,002	1,006
Reported Value Measurement [Member]
Cash equivalents	2,254	5,043
Total	3,253	6,779
Reported Value Measurement [Member] \| Corporate Debt Securities [Member]
Fair value		737
Reported Value Measurement [Member] \| US Treasury Securities [Member]
Fair value	999	999
Estimate of Fair Value Measurement [Member]
Cash equivalents	2,254	5,043
Total	3,256	6,797
Estimate of Fair Value Measurement [Member] \| Corporate Debt Securities [Member]
Fair value		748
Estimate of Fair Value Measurement [Member] \| US Treasury Securities [Member]
Fair value	1,002	1,006
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash equivalents	2,254	5,043
Total	2,254	5,043
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member] \| Corporate Debt Securities [Member]
Fair value		0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member] \| US Treasury Securities [Member]
Fair value	0	0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Cash equivalents	0	0
Total	1,002	1,754
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member] \| Corporate Debt Securities [Member]
Fair value		748
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member] \| US Treasury Securities [Member]
Fair value	1,002	1,006
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Cash equivalents	0	0
Total	0	0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member] \| Corporate Debt Securities [Member]
Fair value		0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member] \| US Treasury Securities [Member]
Fair value	$ 0	$ 0