| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | ESSEX INVESTMENT MANAGEMENT CO INC | 909,629 | 4.07 | $5,093,922 | 30-Sep-09 | | OBERWEIS ASSET MANAGEMENT INC. | 763,320 | 3.41 | $4,274,592 | 30-Sep-09 | | Robeco Investment Management, Inc. | 703,525 | 3.14 | $3,939,740 | 30-Sep-09 | | RENAISSANCE TECHNOLOGIES, LLC | 687,900 | 3.07 | $3,852,240 | 30-Sep-09 | | BOGLE INVESTMENT MANAGEMENT LP | 279,068 | 1.25 | $1,562,780 | 30-Sep-09 | | BRIDGEWAY CAPITAL MANAGEMENT, INC. | 191,973 | .86 | $1,075,048 | 30-Sep-09 | | PA COMMONWEALTH OF PUBLIC SCHOOL EMPLOYEES RETIREMENT SY | 158,500 | .71 | $887,600 | 30-Sep-09 | | KENNEDY CAPITAL MANAGEMENT, INC. | 150,600 | .67 | $843,360 | 30-Sep-09 | | DEUTSCHE BANK AKTIENGESELLSCHAFT | 145,000 | .65 | $812,000 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 51,650 | .23 | $289,240 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | Robeco Inv fds-Robeco Boston Partners Long/Short Equity Fd | 630,830 | 2.82 | $3,122,608 | 31-Aug-09 | | BRIDGEWAY FDS INC-ULTRA SMALL COMPANY MARKET FD | 126,930 | .57 | $267,822 | 30-Jun-09 | | Unified Series Trust-Auer Growth Fd | 58,000 | .26 | $324,800 | 30-Sep-09 | | Managers AMG Funds-Essex Small/Micro Cap Growth Fund | 49,385 | .22 | $244,455 | 31-Aug-09 | | ISHARES Russell Micro Cap (TM) Index Fund | 38,712 | .17 | $216,787 | 30-Sep-09 |
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Value shown is computed using the security's price on the report date given.
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