| Trigran Investments, Inc. | 1,631,749 | $106,536,892 | 10.68% |
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| ACK Asset Management | 389,258 | $25,415 | 4.67% |
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| Pembroke Management, LTD | 443,561 | $28,960,098 | 3.10% |
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| Roubaix Capital, LLC | 39,531 | $2,580,979 | 2.09% |
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| DISCIPLINED GROWTH INVESTORS INC /MN | 1,200,699 | $78,393,638 | 2.01% |
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| Van Berkom & Associates Inc. | 694,795 | $45,363 | 1.94% |
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| Global Alpha Capital Management Ltd. | 287,678 | $18,782,497 | 1.84% |
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| Telemark Asset Management, LLC | 130,000 | $8,488,000 | 1.29% |
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| Mesirow Institutional Investment Management, Inc. | 126,680 | $8,270,937 | 1.09% |
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| Bouvel Investment Partners, LLC | 24,494 | $1,599,213 | 1.03% |
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| Guinness Asset Management LTD | 527,722 | $34,454,969 | 0.97% |
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| Guinness Atkinson Asset Management Inc | 23,395 | $1,527,460 | 0.96% |
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| Bridge City Capital, LLC | 28,574 | $1,866 | 0.96% |
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| Hill City Capital, LP | 72,600 | $4,740,054 | 0.82% |
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| CHATHAM CAPITAL GROUP, INC. | 43,758 | $2,856,960 | 0.67% |
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| Lisanti Capital Growth, LLC | 61,010 | $3,983,343 | 0.54% |
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| Robeco Schweiz AG | 413,500 | $26,997,415 | 0.49% |
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| PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. | 106,303 | $6,940,538 | 0.45% |
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| FULLER & THALER ASSET MANAGEMENT, INC. | 964,053 | $62,943 | 0.40% |
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| CONNORS INVESTOR SERVICES INC | 48,877 | $3,191,179 | 0.40% |
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