| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | TCW GROUP, INC. (THE) | 675,401 | 5.84 | $9,320,533 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 637,200 | 5.51 | $8,793,360 | 30-Sep-09 | | RENAISSANCE TECHNOLOGIES, LLC | 465,700 | 4.02 | $6,426,660 | 30-Sep-09 | | Perimeter Capital Partners LLC | 434,599 | 3.76 | $5,997,466 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 412,086 | 3.56 | $5,686,786 | 30-Sep-09 | | PERKINS CAPITAL MANAGEMENT, INC. | 320,200 | 2.77 | $4,418,760 | 30-Sep-09 | | ESSEX INVESTMENT MANAGEMENT CO INC | 316,000 | 2.73 | $4,360,800 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 303,941 | 2.63 | $4,194,385 | 30-Sep-09 | | Sparta Asset Management, LLC | 271,801 | 2.35 | $3,750,853 | 30-Sep-09 | | OBERWEIS ASSET MANAGEMENT INC. | 235,600 | 2.04 | $3,251,280 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | ISHARES RUSSELL 2000 INDEX FD | 169,780 | 1.47 | $2,342,964 | 30-Sep-09 | | VANGUARD SMALL-CAP INDEX FUND | 141,147 | 1.22 | $2,931,623 | 30-Jun-09 | | DFA U.S. MICRO CAP SERIES | 119,202 | 1.03 | $1,809,486 | 30-Apr-09 | | Advisors Inner Circle Fd II-Perimeter Small Cap Growth Fund | 114,823 | .99 | $1,774,015 | 31-Jul-09 | | Managers AMG Funds-Essex Small/Micro Cap Growth Fund | 99,621 | .86 | $1,567,038 | 31-Aug-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 91,575 | .79 | $1,902,012 | 30-Jun-09 | | ISHARES RUSSELL 2000 GROWTH INDEX FD | 89,221 | .77 | $1,231,249 | 30-Sep-09 | | VANGUARD SMALL-CAP GROWTH INDEX FUND | 88,765 | .77 | $1,843,649 | 30-Jun-09 | | Transamerica Partners Fd-Small Growth Port | 66,691 | .58 | $1,385,172 | 30-Jun-09 | | COLLEGE RETIREMENT EQUITIES FUND-STOCK ACCOUNT | 58,107 | .50 | $1,206,882 | 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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