| UPGRADES & DOWNGRADES HISTORY |
| Date | Research Firm | Action | From | To | | 13-Aug-08 | Piper Jaffray | Downgrade | Buy | Neutral | | 13-Aug-08 | Roth Capital | Upgrade | Hold | Buy | | 18-Apr-08 | Jefferies & Co | Initiated | | Buy | | 19-Dec-07 | Piper Jaffray | Initiated | | Buy |
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| Current Month | Last Month | Two Months Ago | Three Months Ago | | Strong Buy | 1 | 1 | 1 | 1 | | Buy | 1 | 1 | 1 | 1 | | Hold | 0 | 0 | 0 | 0 | | Underperform | 0 | 0 | 0 | 0 | | Sell | 0 | 0 | 0 | 0 |
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