Note 7 - Segment Information - Summary of Financial Information Concerning Company's Reportable Segments (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Aug. 11, 2022
Revenues	$ 1,937,929	$ 1,707,124
Cost of revenue	60,751	0
Operating expenses	2,159,217	942,665
Other income (expenses)	320,238	(2,842)
Net income (loss)	5,966	761,617
Goodwill	737,869		$ 737,869	$ 737,869
Identifiable assets	22,259,921		21,471,495
Operating Segments [Member]
Revenues	1,937,929	1,707,124
Cost of revenue	60,751	0
Operating expenses	2,159,217	942,665
Other income (expenses)	288,005	(2,842)
Net income (loss)	5,966	761,617
Goodwill	737,869	0
Identifiable assets	21,522,052	3,554,765
Crossing Bridge Advisor LLC [Member]
Revenues	1,727,254	1,707,124
Goodwill	737,869		$ 737,869
Crossing Bridge Advisor LLC [Member] | Operating Segments [Member]
Revenues	1,727,254	1,707,124
Cost of revenue	0	0
Operating expenses	1,363,094	942,665
Other income (expenses)	291	(2,842)
Net income (loss)	364,451	761,617
Goodwill	737,869	0
Identifiable assets	2,407,023	3,554,765
Willow Oak Asset Management LLC [Member]
Revenues	24,513	0
Willow Oak Asset Management LLC [Member] | Operating Segments [Member]
Revenues	24,513	0
Cost of revenue	0	0
Operating expenses	94,818	0
Other income (expenses)	(95)	0
Net income (loss)	(70,400)	0
Goodwill	0	0
Identifiable assets	647,997	0
Internet Operations [Member]
Revenues	186,162	0
Cost of revenue	60,751	0
Internet Operations [Member] | Operating Segments [Member]
Revenues	186,162	0
Cost of revenue	60,751	0
Operating expenses	61,526	0
Other income (expenses)	(157)	0
Net income (loss)	63,728	0
Goodwill	0	0
Identifiable assets	856,920	0
Other Segments [Member] | Operating Segments [Member]
Revenues	0	0
Cost of revenue	0	0
Operating expenses	639,779	0
Other income (expenses)	287,966	0
Net income (loss)	(351,813)	0
Goodwill	0	0
Identifiable assets	$ 17,610,112	$ 0