I believe there was shorting before earnings Earnings are usually a disaster with this stock, so there probably was some shorting before the earnings release. Now the shorts might be frustrated because earnings were decent and the stock price did not drop like a rock like it usually does.
Shorts might actually cause a little bounce here as they are forced to cover.
Keeping in mind the number of shorts in this stock is extremely small compared to the float. They might be able to push the price by a penny or two, but they are not going to make much difference either way.