Balt Receives IDE Approval From the FDA to Begin the STEM Trial May 15, 2020 Los Angeles Biotechnology Network News Los Angeles Biotech News Comments Off on Balt Receives IDE Approval From the FDA to Begin the STEM Trial IRVINE, Calif.–(BUSINESS WIRE)–Balt receives IDE approval from the FDA to begin the STEM Trial for the treatment of chronic Sub-Dural Hematoma (cSDH).