Note 10 - Segment Information (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Three months ended September 30,				Nine months ended September 30,
Sale of Product	2025		2024		2025		2024
Theranostics Products	$	1,484,284	$	2,183,197	$	5,176,740	$	6,257,410
Cobalt Products		766,682		814,845		1,517,147		1,641,012
Calibration & Reference Products		961,093		926,402		3,301,673		2,099,713
Medical Device Products		65,757		—		176,476		—
Fluorine Products		—		—		—		—
Total Segments		3,277,816		3,924,444		10,172,036		9,998,135
Corporate revenue		—		—		—		—
Total Consolidated	$	3,277,816	$	3,924,444	$	10,172,036	$	9,998,135

	Three months ended September 30,				Nine months ended September 30,
Depreciation and Amortization	2025		2024		2025		2024
Theranostics Products	$	9,962	$	7,785	$	28,066	$	22,528
Cobalt Products		16,360		13,689		48,722		41,103
Calibration & Reference Products		31,481		30,429		92,841		91,848
Medical Device Products		—		—		—		—
Fluorine Products		26,095		20,345		78,285		78,285
Total Segments		83,898		72,248		247,914		233,764
Corporate depreciation and amortization		16,820		28,541		51,784		67,447
Total Consolidated	$	100,718	$	100,789	$	299,698	$	301,211

	Three months ended September 30,						Nine months ended September 30,
Segment Income (Loss)	2025			2024			2025			2024
Theranostics Products	$	634,625		$	1,289,266		$	2,521,006		$	3,474,120
Cobalt Products		245,837			(51,805	)		571			(18,806	)
Calibration & Reference Products		(99,118	)		39,519			130,058			(328,743	)
Medical Device Products		(187,615	)		(167,451	)		(570,589	)		(279,801	)
Fluorine Products		(76	)		(26,095	)		(22,330	)		(30,941	)
Total Segments		593,653			1,083,434			2,058,716			2,815,829
Corporate loss		(797,254	)		(933,183	)		(2,535,796	)		(3,053,074	)
Net Income	$	(203,601	)	$	150,251		$	(477,080	)	$	(237,245	)

	Three months ended September 30,				Nine months ended September 30,
Expenditures for Segment Assets	2025		2024		2025		2024
Theranostics Products	$	—	$	—	$	50,561	$	146,295
Cobalt Products		—		39,799		12,835		39,799
Calibration & Reference Products		—		—		75,663		49,038
Medical Device Products		64,017		—		92,893		—
Fluorine Products		—		—		—		—
Total Segments		64,017		39,799		231,952		235,132
Corporate purchases		—		4,216		22,439		32,175
Total Consolidated	$	64,017	$	44,015	$	254,391	$	267,307

	September 30,		December 31,
Segment Assets	2025		2024
Theranostics Products	$	1,285,118	$	992,513
Cobalt Products		724,834		167,881
Calibration & Reference Products		2,709,918		2,928,814
Medical Device Products		699,583		553,117
Fluorine Products		4,797,454		4,875,738
Total Segments		10,216,907		9,518,063
Corporate assets		7,629,730		7,642,905
Total Consolidated	$	17,846,637	$	17,160,968