Note 12 - Segments - Segments (Details) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Revenue	$ 278,722		$ 490,110	$ 698,368	$ 730,005
Assets	10,587,126			10,587,126		$ 14,417,249
Depreciation and Amortization	(164,165)		(180,135)	(326,730)	(417,989)
Net loss	(3,181,261)	$ (4,218,843)	(3,923,368)	(7,400,104)	(7,345,170)
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Revenue	0		0	0	0
Assets	5,782,586			5,782,586		8,782,034
Depreciation and Amortization	(1,819)		(2,023)	(3,670)	(3,677)
Net loss	(1,445,691)		(1,461,651)	(3,813,731)	(2,956,255)
Pittsburgh [Member] | Operating Segments [Member]
Revenue	67,255		13,844	72,113	24,471
Assets	2,968,289			2,968,289		3,263,270
Depreciation and Amortization	(31,408)		(31,945)	(63,505)	(143,767)
Net loss	(1,010,978)		(1,594,587)	(2,207,043)	(2,753,692)
Birmingham [Member] | Operating Segments [Member]
Revenue	20,813		84,880	31,822	98,529
Assets	696,017			696,017		981,914
Depreciation and Amortization	(123,714)		(136,194)	(244,508)	(253,794)
Net loss	(459,012)		(585,443)	(924,174)	(1,068,139)
Eagan [Member] | Operating Segments [Member]
Revenue	190,654		391,386	594,433	607,005
Assets	1,140,234			1,140,234		$ 1,390,031
Depreciation and Amortization	(7,224)		(9,973)	(15,047)	(16,751)
Net loss	$ (265,580)		$ (281,687)	$ (455,156)	$ (567,084)