| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | ESSEX INVESTMENT MANAGEMENT CO INC | 821,809 | 4.76 | $15,704,769 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 642,558 | 3.72 | $12,279,283 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 539,635 | 3.12 | $10,312,424 | 30-Sep-09 | | WASATCH ADVISORS INC | 436,406 | 2.53 | $8,339,718 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 379,786 | 2.20 | $7,257,710 | 30-Sep-09 | | BARES CAPITAL MANAGEMENT INC | 2,442,128 | 14.14 | $46,669,066 | 30-Sep-09 | | GLOBEFLEX CAPITAL, L.P. | 335,261 | 1.94 | $6,406,837 | 30-Sep-09 | | STATE STREET CORPORATION | 230,455 | 1.33 | $4,403,995 | 30-Sep-09 | | American Century Companies, Inc. | 208,598 | 1.21 | $3,986,307 | 30-Sep-09 | | ROTHSCHILD ASSET MANAGEMENT INC | 181,008 | 1.05 | $3,459,062 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | WASATCH MICROCAP FUND | 270,270 | 1.56 | $3,313,510 | 30-Jun-09 | | Managers AMG Funds-Essex Small/Micro Cap Growth Fund | 221,683 | 1.28 | $3,817,381 | 31-Aug-09 | | ISHARES RUSSELL 2000 INDEX FD | 185,796 | 1.08 | $3,550,561 | 30-Sep-09 | | VANGUARD SMALL-CAP INDEX FUND | 155,824 | .90 | $1,910,402 | 30-Jun-09 | | DFA U.S. MICRO CAP SERIES | 146,489 | .85 | $1,611,379 | 30-Apr-09 | | BRIDGEWAY FDS INC-ULTRA SMALL COMPANY MARKET FD | 126,700 | .73 | $1,553,342 | 30-Jun-09 | | COLLEGE RETIREMENT EQUITIES FUND-STOCK ACCOUNT | 108,034 | .63 | $1,324,496 | 30-Jun-09 | | VANGUARD SMALL-CAP GROWTH INDEX FUND | 98,258 | .57 | $1,204,643 | 30-Jun-09 | | ISHARES RUSSELL 2000 GROWTH INDEX FD | 97,343 | .56 | $1,860,224 | 30-Sep-09 | | AMERICAN CENTURY NEW OPPORTUNITIES II FUND | 96,038 | .56 | $1,835,286 | 30-Sep-09 |
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*
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Value shown is computed using the security's price on the report date given.
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