| Tieton Capital Management, LLC | 512,254 | $8,181 | 5.16% |
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| Millrace Asset Group, Inc. | 209,524 | $3,346 | 4.13% |
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| RK Capital | 884,347 | $14,123,022 | 3.34% |
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| Manatuck Hill Partners, LLC | 407,900 | $6,514,163 | 2.95% |
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| MARTIN & CO INC /TN/ | 380,979 | $6,084,227 | 1.60% |
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| FORMULA GROWTH LTD | 292,493 | $4,671,113 | 1.59% |
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| Mesirow Financial Investment Management, Inc. | 19,714 | $314,833 | 1.37% |
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| Minerva Advisors LLC | 121,458 | $1,937 | 1.35% |
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| Trellus Management Company, LLC | 48,763 | $778,745 | 1.07% |
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| WHITE PINE CAPITAL LLC | 144,139 | $2,301,900 | 0.92% |
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| Cruiser Capital Advisors, LLC | 35,000 | $558,950 | 0.76% |
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| OBERWEIS ASSET MANAGEMENT INC/ | 416,700 | $6,654,699 | 0.71% |
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| MARATHON CAPITAL MANAGEMENT | 164,275 | $2,623,472 | 0.66% |
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| ESSEX INVESTMENT MANAGEMENT CO LLC | 218,634 | $3,491,585 | 0.57% |
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| EAM Investors, LLC | 182,042 | $2,907,211 | 0.56% |
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| HEARTLAND ADVISORS INC | 550,000 | $8,783,500 | 0.49% |
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| Empirical Asset Management, LLC | 21,346 | $340,896 | 0.30% |
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| Continuum Advisory, LLC | 112,330 | $1,793,910 | 0.29% |
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| Cox Capital Mgt LLC | 22,505 | $359,405 | 0.25% |
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| Portolan Capital Management | 163,953 | $2,618,329 | 0.24% |
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