Revenue Recognition - Summary of Sales from Contracts with Customers Disaggregated by Business Segment and Geography (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenues	$ 2,789,273	$ 2,617,514	$ 8,031,522	$ 7,369,922
Percent of total revenues	100.00%	100.00%	100.00%	100.00%
U.S.
Disaggregation of Revenue [Line Items]
Total revenues	$ 2,413,279	$ 2,250,025	$ 7,030,138	$ 6,298,188
Outside U.S.
Disaggregation of Revenue [Line Items]
Total revenues	375,994	367,489	1,001,384	1,071,734
Radiochemical Products
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,298,667	$ 1,210,615	$ 4,304,629	$ 3,100,001
Percent of total revenues	47.00%	46.00%	53.00%	42.00%
Radiochemical Products | U.S.
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,140,535	$ 1,065,690	$ 3,917,106	$ 2,703,614
Radiochemical Products | Outside U.S.
Disaggregation of Revenue [Line Items]
Total revenues	158,132	144,925	387,523	396,387
Cobalt Products
Disaggregation of Revenue [Line Items]
Total revenues	$ 424,731	$ 408,808	$ 695,783	$ 1,104,176
Percent of total revenues	15.00%	16.00%	9.00%	15.00%
Cobalt Products | U.S.
Disaggregation of Revenue [Line Items]
Total revenues	$ 412,811	$ 407,308	$ 668,563	$ 1,083,332
Cobalt Products | Outside U.S.
Disaggregation of Revenue [Line Items]
Total revenues	11,920	1,500	27,220	20,844
Nuclear Medicine Products
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,065,875	$ 990,328	$ 3,031,110	$ 3,135,970
Percent of total revenues	38.00%	38.00%	38.00%	43.00%
Nuclear Medicine Products | U.S.
Disaggregation of Revenue [Line Items]
Total revenues	$ 859,933	$ 769,264	$ 2,444,469	$ 2,481,467
Nuclear Medicine Products | Outside U.S.
Disaggregation of Revenue [Line Items]
Total revenues	205,942	221,064	586,641	654,503
Fluorine Products
Disaggregation of Revenue [Line Items]
Total revenues	$ 0	$ 7,763	$ 0	$ 29,775
Percent of total revenues	0.00%	0.00%	0.00%	0.00%
Fluorine Products | U.S.
Disaggregation of Revenue [Line Items]
Total revenues	$ 0	$ 7,763	$ 0	$ 29,775
Fluorine Products | Outside U.S.
Disaggregation of Revenue [Line Items]
Total revenues	$ 0	$ 0	$ 0	$ 0