Sounds reasonable to assume that it is a good sign.
Maybe it means that nobody is willing to take the risk of shorting because they see the chance that CCTC could very well release a PR that would send the stock price up.....in which case anyone caught being short would have to chase the stock and lose money.
I am feeling better about seeing the number of shortable shares drop from 200,000 to 100,000 to 15,000 currently. Seems like a positive trend to me!!!