Einhorn just dropped his lawsuit. The only real hope for the longs in the short-term was that the company would either boost the dividend payout or buy back shares to increase demand. Einhorn's suit was an attempt to force management to do that and it has now been taken off the table.
The stock has a ways to go on the downside. It's still significantly over-owned by institutions. That's many millions of shares that money managers would like to sell - even if they have no intention of getting out of the stock entirely. Short interest is only a few hours worth of trading volume so there's no real buying pressure to be had from that quarter.