Within a few days, we should get the reading on short interest for February 15th. If it is still high, the shorts are trapped. Now they know that three quarters of the entire float is held by funds and insiders, where will the covering stock come from? Moreover, the short interest is 56.7% of the float.
Right now nobody is expecting any imminent news, so anything positive and this could explode and have one of those 50% days again.
The downside is really limited here. I can't think of too many negative catalysts other than criminal charges for the CEO/CFO, but the DOJ has never even confirmed that there really is an investigation going on.