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Note 4 - Cash, Cash Equivalents and Marketable Securities - Marketable Securities (Details)	Jun. 30, 2023 USD ($)
Amortized cost	$ 12,444,315
Unrealized gains	263
Unrealized losses	(35,638)
Fair value	12,408,940
Fair value	12,408,940
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Amortized cost	9,445,220
Unrealized gains	263
Unrealized losses	(21,313)
Fair value	9,424,170
Fair value	9,424,170
US Treasury Securities [Member]
Amortized cost	2,999,095
Unrealized gains	0
Unrealized losses	(14,325)
Fair value	2,984,770
Fair value	$ 2,984,770

X

- Definition

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).

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