Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Summary of Sales from Contracts with Customers Disaggregated by Business Segment and Geography

	Three Months Ended June 30, 2018							Three Months Ended June 30, 2017
	U.S.		Outside U.S.		Total Revenues		% of Total Revenues	U.S.		Outside U.S.		Total Revenues		% of Total Revenues
Radiochemical Products	$	545,344	$	57,000	$	602,344	25%	$	515,676	$	43,141	$	558,817	31%
Cobalt Products		324,768		-		324,768	14%		84,643		-		84,643	5%
Nuclear Medicine Products		961,653		1,021		962,674	40%		834,698		-		834,698	47%
Radiological Services		111,175		391,345		502,520	21%		303,535		4,131		307,666	17%
Fluorine Products		-		-		-	0%		-		-		-	0%
	$	1,942,940	$	449,366	$	2,392,306	100%	$	1,738,552	$	47,272	$	1,785,824	100%

	Six Months Ended June 30, 2018							Six Months Ended June 30, 2017
	U.S.		Outside U.S.		Total Revenues		% of Total Revenues	U.S.		Outside U.S.		Total Revenues		% of Total Revenues
Radiochemical Products	$	1,073,962	$	111,924	$	1,185,885	22%	$	1,082,069	$	90,328	$	1,172,397	32%
Cobalt Products		652,546		-		652,546	12%		304,066		-		304,066	8%
Nuclear Medicine Products		1,959,387		5,401		1,964,787	39%		1,645,104		-		1,643,104	46%
Radiological Services		250,347		1,139,767		1,390,114	27%		487,324		13,141		500,465	14%
Fluorine Products		-		-		-	0%		-		-		-	0%
	$	3,936,241	$	1,257,091	$	5,193,332	100%	$	3,518,564	$	103,469	$	3,620,032	100%