The shorts borrow stock from those two you mentioned, and more, to sell for them. There is no way we , as retail ,can distinguish between retail selling or short selling. The short sellers can get this info daily and it keeps them on top of the trading.

I wonder if the AMEX listing now would help us? There was some promo done stateside, but those guys are probably already in. To get new buyers, you would need news at the time of the listing or shortly after.