Note 2 - Principal Contracts and Agreements - Summary of Expenses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Amount Recognized for Custody Services	$ 428,243	$ 410,660	$ 363,000
Amount Recognized for Distribution Services	4,007,582	4,075,048	3,281,450
Amount Recognized for Wilmington Trust	141,582	157,326	123,465
Related Party [Member]
Amount Waived	70,069	518,599	1,052,715
Custody Services [Member] | Related Party [Member]
Amount Recognized for Custody Services	428,243	410,660	363,000
Amount Waived	22,857	42,625	120,850
Distribution Services [Member] | Related Party [Member]
Amount Waived	8,853	48,593	94,724
Amount Recognized for Distribution Services	155,431	200,313	186,531
Wilmington Trust Company [Member] | Related Party [Member]
Amount Waived	171	550	991
Amount Recognized for Wilmington Trust	$ 3,300	$ 3,300	$ 3,300