In general, reverse splits are a bad sign. It's often a desperate attempt to get the stock price higher into "respectable" range. But they don't usually stay there for long, and slide back down, as shareholders lose even more money as it hits new lows (split adjusted).
SIMH reverse split twice in the past, most recently a year ago, but no idea if they will do it again. I believe a company needs to file with the SEC first, detailing the specifics.