| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | RENAISSANCE TECHNOLOGIES, LLC | 1,379,900 | 4.82 | $8,679,571 | 30-Sep-09 | | INSIGHT CAPITAL RESEARCH & MANAGEMENT INC. | 1,301,011 | 4.54 | $8,183,359 | 30-Sep-09 | | ESSEX INVESTMENT MANAGEMENT CO INC | 1,236,277 | 4.31 | $7,776,182 | 30-Sep-09 | | OBERWEIS ASSET MANAGEMENT INC. | 1,133,720 | 3.96 | $7,131,098 | 30-Sep-09 | | Perimeter Capital Partners LLC | 589,835 | 2.06 | $3,710,062 | 30-Sep-09 | | PETERSEN, FLYNN & DINSMORE, INC. | 407,647 | 1.42 | $2,564,099 | 30-Sep-09 | | MARXE, AUSTIN W. & GREENHOUSE, DAVID M. | 337,030 | 1.18 | $2,119,918 | 30-Sep-09 | | BRIDGEWAY CAPITAL MANAGEMENT, INC. | 286,600 | 1.00 | $1,802,714 | 30-Sep-09 | | PA COMMONWEALTH OF PUBLIC SCHOOL EMPLOYEES RETIREMENT SY | 268,500 | .94 | $1,688,865 | 30-Sep-09 | | BOGLE INVESTMENT MANAGEMENT LP | 256,622 | .90 | $1,614,152 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | Managers AMG Funds-Essex Small/Micro Cap Growth Fund | 295,968 | 1.03 | $1,852,759 | 31-Aug-09 | | BRIDGEWAY FDS INC-ULTRA SMALL COMPANY FD | 267,600 | .93 | $1,766,160 | 30-Jun-09 | | OBERWEIS MICRO-CAP PORTFOLIO | 162,100 | .57 | $1,069,860 | 30-Jun-09 | | BOGLE INVESTMENT MANAGEMENT-SMALL CAP GROWTH FUND | 78,950 | .28 | $494,227 | 31-Aug-09 | | Principal Small Cap Growth Fd II | 62,566 | .22 | $412,935 | 30-Jun-09 | | RiverSource Small Cap Growth | 31,959 | .11 | $210,929 | 30-Jun-09 | | Meyers Capital Inv Tr-Meyers Capital Aggressive Growth Fd | 25,001 | .09 | $156,506 | 31-Aug-09 | | Powershares Exgh Traded Fd Tr-Powershares Zacks Micro Cap Po | 17,129 | .06 | $132,235 | 31-Jul-09 | | OBERWEIS SMALL CAP OPPORTUNTIES FUND | 16,300 | .06 | $107,580 | 30-Jun-09 | | PRINCIPAL VAR CONTRACTS FD-SMALL-CAP GROWTH ACCT II | 10,181 | .04 | $67,194 | 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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