| Upgrades & Downgrades History |
|---|
| Date | Research Firm | Action | From | To |
|---|
| Apr 25, 2011 | William Blair | Initiated | | Mkt Perform | | Nov 12, 2007 | Citigroup | Upgrade | Hold | Buy | | Nov 7, 2007 | Bear Stearns | Initiated | | Outperform | | Jul 30, 2006 | Maxim Group | Upgrade | Hold | Buy | | May 11, 2006 | Maxim Group | Downgrade | Buy | Hold | | Sep 11, 2005 | Morgan Stanley | Initiated | | Equal-weight | | Jan 17, 2005 | Piper Jaffray | Downgrade | Outperform | Market Perform | | Nov 18, 2004 | Piper Jaffray | Initiated | | Outperform |
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| Current Month | Last Month | Two Months Ago | Three Months Ago |
|---|
| Strong Buy | 2 | 2 | 2 | 2 |
|---|
| Buy | 1 | 1 | 1 | 1 |
|---|
| Hold | 1 | 0 | 0 | 0 |
|---|
| Underperform | 0 | 0 | 0 | 0 |
|---|
| Sell | 0 | 0 | 0 | 0 |
|---|
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Data provided by Thomson/First Call
Currency in USD. |