 IDAHO FALLS, Idaho, May 18, 2021 PRNewswire -- International Isotopes Inc. OTCQB: INIS the Company is pleased to announce its financial results for the three months ended March 31, 2021. Revenue for the three months ended March 31, 2021 was 1,992,512 as compared to 2,335,786 for the same period in 2020, an overall decrease of approximately 15. 