| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | ESSEX INVESTMENT MANAGEMENT CO INC | 757,670 | 8.46 | $4,015,651 | 30-Sep-09 | | SYSTEMATIC FINANCIAL MANAGEMENT, L.P. | 503,495 | 5.62 | $2,668,523 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 420,573 | 4.69 | $2,229,036 | 30-Sep-09 | | THOMSON HORSTMANN & BRYANT, INC. | 344,900 | 3.85 | $1,827,970 | 30-Sep-09 | | NEW YORK STATE COMMON RETIREMENT FUND | 289,000 | 3.23 | $1,531,700 | 30-Sep-09 | | OBERWEIS ASSET MANAGEMENT INC. | 210,200 | 2.35 | $1,114,060 | 30-Sep-09 | | MARXE, AUSTIN W. & GREENHOUSE, DAVID M. | 1,075,035 | 12.00 | $5,697,685 | 30-Sep-09 | | CALPERS (CALIFORNIA-PUBLIC EMPLOYEES RETIREMENT SYSTEM) | 142,444 | 1.59 | $690,853 | 30-Jun-09 | | GENDELL, JEFFREY L. | 134,300 | 1.50 | $711,790 | 30-Sep-09 | | ARGENT CAPITAL MANAGEMENT | 122,520 | 1.37 | $649,356 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | Managers AMG Funds-Essex Small/Micro Cap Growth Fund | 216,409 | 2.42 | $1,071,224 | 31-Aug-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 77,721 | .87 | $376,946 | 30-Jun-09 | | DFA U.S. MICRO CAP SERIES | 62,270 | .69 | $260,911 | 30-Apr-09 | | DFA Tax Managed U.S. Targeted Value Port | 49,174 | .55 | $282,258 | 31-Jul-09 | | Principal Small Cap Growth Fd II | 46,364 | .52 | $224,865 | 30-Jun-09 | | DFA U.S. SMALL CAP VALUE SERIES | 36,666 | .41 | $153,630 | 30-Apr-09 | | DFA U.S. Targeted Value Portfolio | 34,752 | .39 | $145,610 | 30-Apr-09 | | OBERWEIS MICRO-CAP PORTFOLIO | 28,200 | .31 | $136,770 | 30-Jun-09 | | DFA U.S. SMALL CAP SERIES | 24,270 | .27 | $101,691 | 30-Apr-09 | | RiverSource Small Cap Growth | 23,395 | .26 | $113,465 | 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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