Note 3 - Equity - Shares Repurchase Program (Details) - USD ($)		3 Months Ended					58 Months Ended	147 Months Ended
		Mar. 31, 2024	Dec. 31, 2023		Sep. 30, 2023		Mar. 31, 2024	Mar. 31, 2024	Aug. 29, 2023
Preferred stock redemption (in shares)		140,186						140,186
Stock buyback (in shares)		0	22,012	[1]	155,025	[1]	2,122,703
Price paid per share (in dollars per share)		$ 10.7					$ 10.7	$ 10.7	$ 10.7
July 1, 2023 – September 30, 2023 (in dollars per share)		$ 0	$ 8.79	[1]	$ 8.53	[1]	$ 6.13
Dollars Expended by Period under the Preferred Redemption		$ 1,499,990					$ 1,499,990	$ 1,499,990
July 1, 2023 – September 30, 2023		$ 7,992,206					$ 7,992,206	$ 7,992,206
Preferred Stock, Redemption, Aggerate Purchase Price									$ 8,964,214
Share Repurchase Program [Member]
Stock buyback (in shares)	[1]		193,492		1,322,082
July 1, 2023 – September 30, 2023	[1]		$ 7,992,206		$ 8,185,698
Series B-1 Preferred Stock [Member]
Preferred stock redemption (in shares)	[2]	70,093	70,093		0
Price paid per share (in dollars per share)	[2]	$ 10.7	$ 10.7		$ 10.7		$ 10.7	$ 10.7
Dollars Expended by Period under the Preferred Redemption	[2]	$ 749,995	$ 749,995		$ 0		$ 749,995	$ 749,995
Preferred Stock, Redemption, Aggerate Purchase Price	[2]	$ 772,711	$ 1,522,706				$ 772,711	$ 772,711

[1] We close our books and records on the last calendar day of each month to align our financial closing with our business processes.

[2] We close our books and records on the last calendar day of each month to align our financial closing with our business processes.