I think it's worth mentioning that this short interest vs share price chart can be easily misinterpreted - the old "correlation is not causation" problem. Commonly this chart is used to imply that high levels of shorting will result in future increases in the share price, since these variables appear to move in opposition and historically we have seen big swings.
However, a number of a possibilities exist besides the idea eventual short covering will boost the price. For one, the price could rise for other reasons and then shorts could decide to cut their losses and cover. So covering remains correlated with share price appreciation, but isn't causing (or fully causing) the appreciation.
Alternatively, the share price might never appreciate but rather trend to zero as the shorts hope. Thus shares shorted continues to climb and the price declines, so the correlation holds very well but not in the direction that bulls are hoping for.
Certainly it is well established that short covering does exaggerate upwards movement in the share price, but it alone isn't going to cause a huge increase in the share price. After all, the bears are quite convinced they are right and they aren't going to panic and cover for no reason. Major changes in the share price - good or bad - will start based on news and results, and then shorts will continue to amplify these moves in both directions. So a more valid take away from this chart is that if bulls do get the good results they are hoping for, then the upward movement could be quite exaggerated by covering. If we get bad news, shorts will continue to sell into that and exaggerate the decline (like they did in early April). So in other words, the stock will be volatile.