| PERKINS CAPITAL MANAGEMENT INC | 907,420 | $1,289 | 1.22% |
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| AMH Equity Ltd | 638,933 | $907,285 | 1.20% |
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| Pacific Ridge Capital Partners, LLC | 1,739,715 | $2,470,395 | 0.59% |
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| AWM Investment Company, Inc. | 2,815,742 | $3,998,354 | 0.54% |
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| PERRITT CAPITAL MANAGEMENT INC | 335,800 | $476,836 | 0.26% |
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| Williams & Novak, LLC | 32,400 | $46,008 | 0.04% |
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| EVERETT HARRIS & CO /CA/ | 1,741,655 | $2,473,150 | 0.03% |
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| ESSEX INVESTMENT MANAGEMENT CO LLC | 112,656 | $159,972 | 0.03% |
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| ROYCE & ASSOCIATES LP | 2,012,361 | $2,857,553 | 0.03% |
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| OCCUDO QUANTITATIVE STRATEGIES LP | 90,837 | $128,989 | 0.02% |
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| THOMPSON DAVIS & CO., INC. | 15,000 | $21,300 | 0.02% |
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| GSA CAPITAL PARTNERS LLP | 168,400 | $239 | 0.02% |
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| BERKSHIRE ASSET MANAGEMENT LLC/PA | 144,664 | $205,423 | 0.01% |
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| NAVELLIER & ASSOCIATES INC | 52,062 | $73,928 | 0.01% |
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| Werba Rubin Papier Wealth Management | 19,290 | $27,392 | 0.01% |
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| KING LUTHER CAPITAL MANAGEMENT CORP | 1,029,252 | $1,461,538 | 0.01% |
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| Cutter & CO Brokerage, Inc. | 16,350 | $23,217 | 0.01% |
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| Legato Capital Management LLC | 24,625 | $34,967 | 0.01% |
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| Renaissance Technologies | 1,055,511 | $1,498,826 | 0.00% |
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| RITHOLTZ WEALTH MANAGEMENT | 47,496 | $67,444 | 0.00% |
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