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Note 7 - Marketable Debt Securities - Schedule of Securities (Details) - USD ($) $ in Thousands | Aug. 31, 2025 | Nov. 30, 2024
--- | --- | ---
Amortized cost | $ 2,474 | $ 8,839
Unrealized gains | 27 | 65
Unrealized losses | 0 | 0
Fair value | 2,501 | 8,904
Investments | 2,501 | 8,904
Corporate Debt Securities [Member] |  |
Amortized cost | 1,475 | 2,950
Unrealized gains | 20 | 18
Unrealized losses | 0 | 0
Fair value | 1,495 | 2,968
Investments | 1,495 | 2,968
US Treasury Securities [Member] |  |
Amortized cost | 999 | 5,889
Unrealized gains | 7 | 47
Unrealized losses | 0 | 0
Fair value | 1,006 | 5,936
Investments | $ 1,006 | $ 5,936

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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
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