| Filed On | Filing |
|---|---|
| 23 Jun 2011 |
Form 4/A: Seligman Spectrum Focus (Master) Fund, 10% owner
Bought 1,000 shares ($2.75K) |
| 17 Sep 2010 |
Form 4/A: Columbia Management Investment ADVISERS, Llc, 10% owner and 1 other
Bought 0 shares |
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