Note 8 - Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended June 30, 2024									Three Months Ended June 30, 2023
			Outside		Total		% of Total					Outside		Total		% of Total
	U.S.		U.S.		Revenues		Revenues			U.S.		U.S.		Revenues		Revenues
Theranostics Products	$	2,030,018	$	139,113	$	2,169,131		68	%	$	1,605,313	$	130,730	$	1,736,043		56	%
Cobalt Products		588,599		3,600		592,199		19	%		395,395		52,863		448,258		14	%
Nuclear Medicine Products		230,914		176,989		407,903		13	%		732,524		195,340		927,864		30	%
Medical Devices Products		—		—		—		0	%		—		—		—		0	%
Fluorine Products		—		—		—		0	%		—		—		—		0	%
	$	2,849,531	$	319,702	$	3,169,233		100	%	$	2,733,232	$	378,933	$	3,112,165		100	%

	Six Months Ended June 30, 2024									Six Months Ended June 30, 2023
			Outside		Total		% of Total					Outside		Total		% of Total
	U.S.		U.S.		Revenues		Revenues			U.S.		U.S.		Revenues		Revenues
Radiochemical Products	$	3,650,544	$	423,669	$	4,074,213		67	%	$	3,230,429	$	268,010	$	3,498,439		56	%
Cobalt Products		803,967		22,200		826,167		14	%		537,553		69,013		606,566		10	%
Nuclear Medicine Products		766,343		406,968		1,173,311		19	%		1,604,112		492,583		2,096,695		34	%
Medical Devices Products		—		—		—		0	%		—		—		—		0	%
Fluorine Products		—		—		—		0	%		—		—		—		0	%
	$	5,220,854	$	852,837	$	6,073,691		100	%	$	5,372,094	$	829,606	$	6,201,700		100	%