Superior Bancorp (Nasdaq:SUPR), Lucas Energy Inc (Nasdaq:LEI) and Guaranty Financial Group Inc (Nasdaq:GFG) are among the biggest percentage gainers in Tuesday's trading among companies with market capitalizations under $750 million.

Protection One Inc (Nasdaq:PONE), China Finance Online Co Ltd (Nasdaq:JRJC) and Silicon Graphics Inc (Nasdaq:SGIC) are also among the biggest percentage gainers.

Here are the biggest percentage gainers among small caps:

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