The crew which follows this one tighter than stink on a monkey absolutely refuses to comment on it whatsoever.
I rarely if ever see this ( ? ) column get used on any other stock.
The float involved and the passge of time involved provides for a float which is tightly held. Rare is the time you see any trading action...and then..wham...in comes a million or two or three in volume...with all of them being listed under ( ? ).