| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | WISCONSIN (STATE OF) INVESTMENT BOARD | 2,022,096 | 6.39 | $2,345,631 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 1,732,405 | 5.48 | $2,009,589 | 30-Sep-09 | | RENAISSANCE TECHNOLOGIES, LLC | 1,333,400 | 4.21 | $1,546,744 | 30-Sep-09 | | PERRITT CAPITAL MANAGEMENT, INC. | 999,929 | 3.16 | $1,159,917 | 30-Sep-09 | | MARXE, AUSTIN W. & GREENHOUSE, DAVID M. | 3,721,371 | 11.76 | $4,316,790 | 30-Sep-09 | | WHITE PINE CAPITAL, LLC | 583,890 | 1.85 | $677,312 | 30-Sep-09 | | NEEDHAM INVESTMENT MANAGEMENT, L.L.C. | 558,500 | 1.77 | $647,860 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 510,890 | 1.61 | $592,632 | 30-Sep-09 | | LSV ASSET MANAGEMENT | 267,900 | .85 | $310,764 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 254,906 | .81 | $295,690 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | PERRITT MICROCAP OPPORTUNITIES FUND | 725,029 | 2.29 | $841,033 | 30-Sep-09 | | DFA U.S. SMALL CAP VALUE SERIES | 597,144 | 1.89 | $292,600 | 30-Apr-09 | | NEEDHAM GROWTH FUND | 558,500 | 1.77 | $228,985 | 30-Jun-09 | | DFA U.S. MICRO CAP SERIES | 276,071 | .87 | $135,274 | 30-Apr-09 | | PERRITT EMERGING OPPORTUNITIES FUND | 258,900 | .82 | $300,324 | 30-Sep-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 111,758 | .35 | $45,820 | 30-Jun-09 | | DFA Tax Managed U.S. Targeted Value Port | 97,000 | .31 | $82,450 | 31-Jul-09 | | DFA U.S. SMALL CAP SERIES | 77,271 | .24 | $37,862 | 30-Apr-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 68,496 | .22 | $28,083 | 30-Jun-09 | | Gamco Westwood Small Cap Equity Fd | 34,900 | .11 | $40,484 | 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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