Note 3 - Cash Equivalents and Investments - Schedule of Investments (Details) - USD ($)	Sep. 30, 2026	Dec. 31, 2025
Investments, cost basis	$ 52,365,521	$ 60,718,652
Investments, unrealized gains	121,410	157,317
Investments, unrealized losses	0	0
Investments, aggregate fair value	52,486,931	60,875,969
Investments, unrealized loss	(0)	0
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Investments, cost basis	48,890,235	41,703,814
Investments, unrealized gains	121,410	132,003
Investments, unrealized losses	0	0
Investments, aggregate fair value	49,011,645	41,835,818
Investments, unrealized loss	(0)	0
US Treasury Securities [Member]
Investments, cost basis		12,730,543
Investments, unrealized gains		25,314
Investments, unrealized losses		0
Investments, aggregate fair value		12,755,857
Investments, unrealized loss		0
Money Market Funds [Member]
Investments, cost basis	3,475,286	6,284,294
Investments, unrealized gains	0	0
Investments, unrealized losses	0	0
Investments, aggregate fair value	3,475,286	6,284,294
Investments, unrealized loss	$ (0)	$ 0

Amount, before tax, of unrealized gain 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).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Name Accounting Standards Codification
-Section 50
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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
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-SubTopic 10
-Name Accounting Standards Codification
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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481830/320-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
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-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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