It is 11 days since the pop to around 4.5, many small caps do this after a big upside move, the key is to buy once few shares trade during the day and begin to accumulate at that point, if you are willing to wait until the next pop. That can take a little, or a long time.
Look under SEC filings for the summary. Basically, on 12-10-12 BGMD went 30 consecutive business days below the required $50 million cap. If they go 10 days in a row above this gets cancelled. 12-12 to 12-24 went 9 days in a row above but missed the 10th day 12-26. So still in default. 180 days to comply, or you can get transfered from NASDAQ Capital to NASDAQ Global which has a smaller cap requirement. No delisting at all.