| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | ESSEX INVESTMENT MANAGEMENT CO INC | 656,331 | 7.51 | $11,466,102 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 369,981 | 4.24 | $6,463,568 | 30-Sep-09 | | FMR LLC | 307,700 | 3.52 | $5,375,519 | 30-Sep-09 | | MACKENZIE FINANCIAL CORPORATION | 235,000 | 2.69 | $4,105,450 | 30-Sep-09 | | RENAISSANCE TECHNOLOGIES, LLC | 178,700 | 2.05 | $3,121,889 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 94,998 | 1.09 | $1,659,615 | 30-Sep-09 | | STATE STREET CORPORATION | 93,811 | 1.07 | $1,638,878 | 30-Sep-09 | | OBERWEIS ASSET MANAGEMENT INC. | 91,100 | 1.04 | $1,591,517 | 30-Sep-09 | | Great-West Life Assurance Company | 72,800 | .83 | $1,271,816 | 30-Sep-09 | | BRIDGEWAY CAPITAL MANAGEMENT, INC. | 59,000 | .68 | $1,030,730 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | Managers AMG Funds-Essex Small/Micro Cap Growth Fund | 187,316 | 2.14 | $2,978,324 | 31-Aug-09 | | ISHARES RUSSELL 2000 INDEX FD | 92,270 | 1.06 | $1,611,956 | 30-Sep-09 | | Principal Small Cap Growth Fd II | 48,624 | .56 | $770,690 | 30-Jun-09 | | ISHARES RUSSELL 2000 GROWTH INDEX FD | 48,348 | .55 | $844,639 | 30-Sep-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 36,384 | .42 | $576,686 | 30-Jun-09 | | COLLEGE RETIREMENT EQUITIES FUND-STOCK ACCOUNT | 34,595 | .40 | $548,330 | 30-Jun-09 | | PERRITT EMERGING OPPORTUNITIES FUND | 30,000 | .34 | $524,100 | 30-Sep-09 | | BRIDGEWAY FDS INC-ULTRA SMALL COMPANY MARKET FD | 25,900 | .30 | $410,515 | 30-Jun-09 | | RiverSource Small Cap Growth | 24,536 | .28 | $388,895 | 30-Jun-09 | | DFA TAX-MANAGED U.S. SMALL CAP PORTFOLIO | 22,785 | .26 | $322,179 | 31-Jul-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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