IsoRay (ISR) Reports Q4 Loss, Tops Revenue Estimates Posted byZacks Equity Research September 21, 2021 Leave a comment on IsoRay (ISR) Reports Q4 Loss, Tops Revenue Estimates IsoRay (ISR) delivered earnings and revenue surprises of 0.00% and 3.99%, respectively, for the quarter ended June 2021. Do the numbers hold clues to…