| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | FEDERATED INVESTORS, INC. | 3,065,766 | 9.97 | $15,359,487 | 30-Sep-09 | | BVF INC. | 2,048,950 | 6.66 | $10,265,239 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 1,727,474 | 5.62 | $8,654,644 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 847,758 | 2.76 | $4,247,267 | 30-Sep-09 | | OBERWEIS ASSET MANAGEMENT INC. | 814,700 | 2.65 | $4,081,647 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 699,924 | 2.28 | $3,506,619 | 30-Sep-09 | | RENAISSANCE TECHNOLOGIES, LLC | 656,700 | 2.14 | $3,290,067 | 30-Sep-09 | | STATE STREET CORPORATION | 531,095 | 1.73 | $2,660,785 | 30-Sep-09 | | NORTHERN TRUST CORPORATION | 357,047 | 1.16 | $1,963,758 | 30-Jun-09 | | TRIGRAN INVESTMENTS INC | 352,881 | 1.15 | $1,767,933 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | FEDERATED KAUFMANN FUND | 1,917,233 | 6.23 | $10,295,541 | 31-Jul-09 | | Professionally Managed Portf-Winslow Green Growth Fund | 1,500,000 | 4.88 | $7,515,000 | 30-Sep-09 | | ISHARES RUSSELL 2000 INDEX FD | 448,963 | 1.46 | $2,249,304 | 30-Sep-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 425,553 | 1.38 | $2,340,541 | 30-Jun-09 | | DFA U.S. MICRO CAP SERIES | 315,575 | 1.03 | $1,341,193 | 30-Apr-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 238,412 | .78 | $1,311,266 | 30-Jun-09 | | ISHARES RUSSELL 2000 GROWTH INDEX FD | 231,735 | .75 | $1,160,992 | 30-Sep-09 | | COLLEGE RETIREMENT EQUITIES FUND-STOCK ACCOUNT | 214,711 | .70 | $1,180,910 | 30-Jun-09 | | BRIDGEWAY FDS INC-ULTRA SMALL COMPANY FD | 184,300 | .60 | $1,013,650 | 30-Jun-09 | | FEDERATED KAUFMANN SMALL CAP FUND | 169,720 | .55 | $911,396 | 31-Jul-09 |
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Value shown is computed using the security's price on the report date given.
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