Someone probably Roumell Asset Management tries to higher stock price by buying and selling at the same time with price higher every day. It seems to me they want to lure naieve investors to buy their shares. You can see their scam by looking at inside trading in Yahoo Finance. All amount of daily shares selling daily laterly belongs to Roumell.
Here is the scam: They sold and bought by themselve 100 shares at 9.17 to make people believe stock is moving up. Then put out 2500 shares bloc on the sale side at 9.19 and hope some naieve people would take the bait.