 Perma-Fix Environmental Services NASDAQ:PESI Inc told investors that the global pandemic had hit revenue in the first quarter but that it saw an improvement in March, and expected revenue expansion to continue in the following quarter amid new contracts and a return to normal business. In the three months ended March 31, 2022, the Atlanta-based nuclear services company saw revenue of 15.9 million, down from 23.1 million in the same quarter of 2021. 