| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | BLAIR (WILLIAM) & COMPANY, L.L.C. | 4,755,304 | 7.63 | $44,747,410 | 30-Sep-09 | | Tremblant Capital Group | 4,313,326 | 6.92 | $40,588,397 | 30-Sep-09 | | GILDER, GAGNON, HOWE & CO. | 3,388,404 | 5.44 | $31,884,881 | 30-Sep-09 | | FIRST WILSHIRE SECURITIES MANAGEMENT INC | 2,902,255 | 4.66 | $27,310,219 | 30-Sep-09 | | JANUS CAPITAL MANAGEMENT, LLC | 1,379,532 | 2.21 | $12,981,396 | 30-Sep-09 | | FRIESS ASSOCIATES INC | 1,252,100 | 2.01 | $11,782,261 | 30-Sep-09 | | MFC Global Investment Management (U.S.), LLC | 963,198 | 1.55 | $9,063,693 | 30-Sep-09 | | OBERWEIS ASSET MANAGEMENT INC. | 781,240 | 1.25 | $7,351,468 | 30-Sep-09 | | ROXBURY CAPITAL MANAGEMENT | 760,170 | 1.22 | $7,153,199 | 30-Sep-09 | | EMERALD ADVISERS | 666,636 | 1.07 | $6,273,044 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | BLAIR (WILLIAM) MUTUAL FUNDS, INC.-SMALL CAP GROWTH FUND | 1,460,023 | 2.34 | $13,738,816 | 30-Sep-09 | | JANUS VENTURE FUND | 1,216,370 | 1.95 | $11,446,041 | 30-Sep-09 | | JOHN HANCOCK SMALL CAP EQUITY FUND | 801,038 | 1.29 | $8,250,691 | 31-Oct-09 | | Columbia Fds Ser Tr I-Columbia Small Cap Growth Fd | 470,500 | .76 | $4,422,700 | 31-Aug-09 | | PERRITT MICROCAP OPPORTUNITIES FUND | 300,000 | .48 | $2,823,000 | 30-Sep-09 | | TURNER EMERGING GROWTH FUND | 291,300 | .47 | $2,365,356 | 30-Jun-09 | | FEDERATED KAUFMANN FUND | 200,000 | .32 | $1,800,000 | 31-Jul-09 | | Northern Multi-Manager Small Cap | 194,100 | .31 | $1,826,481 | 30-Sep-09 | | METROPOLITAN SER FD-LOOMIS SAYLES SMALL CAP CORE PORT | 131,879 | .21 | $1,070,857 | 30-Jun-09 | | LOOMIS SAYLES SMALL CAP GROWTH FUND | 109,125 | .18 | $886,095 | 30-Jun-09 |
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Value shown is computed using the security's price on the report date given.
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