The daily volume only exceeded 4 million shares once and 3 million shares twice. The heaviest volume days during the two months it ran from 3.40 to 4.40 were between 1.5 and 2.0 million shares. The typical trading was still less than 1 million shares a day. So, the entire run from 3.0 to 4.8 was on a daily volume of less than 5% of the o/s and 10% of the float.
Volume was 1.6M when positive B-ABSSSI result was announced and 4.3M when QIDP designation was announced. I expect similar volume for B-OM and BTD if result is positive.
I don't recall exactly what the volume was when the stock approached $5, but it was in the 5 to 10 million per day range if memory serves me correctly.