| UPGRADES & DOWNGRADES HISTORY |
| Date | Research Firm | Action | From | To | | 22-May-08 | Morgan Joseph | Initiated | | Buy | | 30-May-07 | Nollenberger Capital | Initiated | | Buy | | 13-Apr-07 | Northland Securities | Initiated | | Outperform | | 2-Dec-04 | Roth Capital | Initiated | | Buy |
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| Current Month | Last Month | Two Months Ago | Three Months Ago | | Strong Buy | 0 | 0 | 0 | 0 | | Buy | 2 | 2 | 2 | 2 | | Hold | 0 | 0 | 0 | 0 | | Underperform | 0 | 0 | 0 | 0 | | Sell | 0 | 0 | 0 | 0 |
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