| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | KOPP INVESTMENT ADVISORS. INC. | 12,339,814 | 6.60 | $13,573,795 | 30-Sep-09 | | GRUBER & MCBAINE CAPITAL MANAGEMENT LLC | 9,014,499 | 4.82 | $9,915,948 | 30-Sep-09 | | Sun Life Financial Inc. | 8,484,436 | 4.54 | $9,332,879 | 30-Sep-09 | | JDS CAPITAL MANAGEMENT, INC. | 5,000,000 | 2.68 | $5,500,000 | 30-Sep-09 | | GRANAHAN INVESTMENT MANAGEMENT INC. | 3,653,090 | 1.95 | $4,018,399 | 30-Sep-09 | | GAM USA, INC. | 3,429,417 | 1.83 | $3,772,358 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 3,230,092 | 1.73 | $3,553,101 | 30-Sep-09 | | NEW GENERATION ADVISERS, INC. | 3,067,370 | 1.64 | $3,374,107 | 30-Sep-09 | | TENNENBAUM CAPITAL PARTNERS LLC | 2,858,110 | 1.53 | $3,143,921 | 30-Sep-09 | | PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C. | 2,736,499 | 1.46 | $3,010,148 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | VANGUARD EXPLORER FUND, INC. | 3,455,800 | 1.85 | $2,038,922 | 31-Jul-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 1,249,468 | .67 | $799,659 | 30-Jun-09 | | DFA U.S. SMALL CAP VALUE SERIES | 704,001 | .38 | $696,960 | 30-Apr-09 | | DFA U.S. MICRO CAP SERIES | 695,820 | .37 | $688,861 | 30-Apr-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 592,408 | .32 | $379,141 | 30-Jun-09 | | DFA U.S. SMALL CAP SERIES | 484,947 | .26 | $480,097 | 30-Apr-09 | | Fidelity Select Portfolios-Select Communications Equipment | 225,900 | .12 | $248,490 | 30-Sep-09 | | SPARTAN EXTENDED MARKET INDEX FUND | 218,610 | .12 | $240,471 | 30-Sep-09 | | COLLEGE RETIREMENT EQUITIES FUND-STOCK ACCOUNT | 181,575 | .10 | $116,208 | 30-Jun-09 | | VANGUARD BALANCED INDEX FUND | 128,729 | .07 | $82,386 | 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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