SM&A (Nasdaq:WINS), First Regional Bancorp (Nasdaq:FRGB) and Ardea Biosciences Inc. (Nasdaq:RDEA) are among the biggest percentage gainers in Friday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Idenix Pharmaceuticals Inc. (Nasdaq:IDIX), Bankrate Inc. (Nasdaq:RATE), Cbeyond Inc. (Nasdaq:CBEY), Loral Space & Communications Inc. (Nasdaq:LORL), DivX Inc. (Nasdaq:DIVX) and Great Atlantic & Pacific Tea Co Inc. (Nasdaq:GAP).

Here are the biggest percentage gainers among small caps:

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