| UPGRADES & DOWNGRADES HISTORY |
| Date | Research Firm | Action | From | To | | 27-Feb-09 | Roth Capital | Upgrade | Hold | Buy | | 24-Apr-08 | Roth Capital | Downgrade | Buy | Hold | | 8-Mar-07 | B. Riley & Co | Initiated | | Buy | | 15-Jun-04 | Roth Capital | Upgrade | Buy | Strong Buy | | 13-Feb-04 | Avondale Partners | Downgrade | Mkt Outperform | Mkt Perform |
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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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