I noticed the following short positions for TNG:

January 15/13  - 1,728 shares

January 31/13  - 277,500 shares

February 15/13  - 928 shares

Looks like the stock got worked down and someone was able to cover their short.  Perhaps as "banx" has indicated regarding a bounce of the share price, with the short covered, we will make our way back up./ok2