The shorts added during the Russell spike - If the stock hadn't been shorted it probably would have spiked higher because of lack of liquidity.
The question is are shorts trying to cover now? We'll find out on the 9th.
The shelf offering news was an excuse to run the stock down in an ATTEMPT to cover.
I don't consider "news based events" to be a fundamental change, the fundamentals are increasingly strong and that is why the shorts had been covering steadily until the Russell event.
I believe it was shorted because the alternative would have been to watch the stock break $4 which could have started long term appreciation of the stock price.