Edge Petroleum Corp (Nasdaq:EPEX), CSG Systems International Inc (Nasdaq:CSGS) and Coldwater Creek Inc (Nasdaq:CWTR) are among the biggest percentage gainers in Tuesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: FCStone Group, Inc. (Nasdaq:FCSX), Dycom Industries Inc (Nasdaq:DY), United Community Banks Inc (Nasdaq:UCBI), City Bank (Nasdaq:CTBK), Ardea Biosciences Inc (Nasdaq:RDEA) and Apex Silver Mines Ltd (Nasdaq:SIL).

Here are the biggest percentage gainers among small caps:

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