| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | Barclays Global Investors UK Holdings Ltd | 2,634,652 | 6.40 | $21,630,492 | 30-Sep-09 | | KOPP INVESTMENT ADVISORS. INC. | 1,966,224 | 4.78 | $16,142,699 | 30-Sep-09 | | MARXE, AUSTIN W. & GREENHOUSE, DAVID M. | 1,714,524 | 4.16 | $14,076,242 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 1,443,937 | 3.51 | $11,854,722 | 30-Sep-09 | | HEARTLAND ADVISORS INC. | 893,800 | 2.17 | $7,338,098 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 845,738 | 2.05 | $6,943,508 | 30-Sep-09 | | STATE STREET CORPORATION | 736,050 | 1.79 | $6,042,970 | 30-Sep-09 | | Argyll Research, LLC | 606,800 | 1.47 | $4,981,828 | 30-Sep-09 | | BLAIR (WILLIAM) & COMPANY, L.L.C. | 526,446 | 1.28 | $4,322,121 | 30-Sep-09 | | WASATCH ADVISORS INC | 463,945 | 1.13 | $3,808,988 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | HEARTLAND VALUE FUND | 2,000,000 | 4.86 | $9,880,000 | 30-Jun-09 | | ISHARES RUSSELL 2000 INDEX FD | 604,045 | 1.47 | $4,959,209 | 30-Sep-09 | | VANGUARD SMALL-CAP INDEX FUND | 423,159 | 1.03 | $2,090,405 | 30-Jun-09 | | ISHARES NASDAQ BIOTECHNOLOGY INDEX FUND | 382,069 | .93 | $2,032,607 | 31-Oct-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 371,565 | .90 | $1,835,531 | 30-Jun-09 | | BRIDGEWAY FDS INC-ULTRA SMALL COMPANY MARKET FD | 370,100 | .90 | $1,828,294 | 30-Jun-09 | | DFA U.S. MICRO CAP SERIES | 343,507 | .83 | $1,459,904 | 30-Apr-09 | | ISHARES RUSSELL 2000 GROWTH INDEX FD | 316,084 | .77 | $2,595,049 | 30-Sep-09 | | VANGUARD SMALL-CAP GROWTH INDEX FUND | 268,667 | .65 | $1,327,214 | 30-Jun-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 234,831 | .57 | $1,160,065 | 30-Jun-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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