Progenics Pharmaceuticals, Inc. (Nasdaq:PGNX), Income Opportunity Realty Investors, Inc. (AMEX:IOT) and Wilshire Bancorp, Inc. (Nasdaq:WIBC) are among the biggest percentage gainers in Friday's trading among companies with market capitalizations under $750 million.

Pyramid Oil Co. (AMEX:PDO), Gencor Industries, Inc. (Nasdaq:GENC) and Immersion Corp. (Nasdaq:IMMR) are also among the top small-cap percentage gainers.

Here are Friday's biggest percentage gainers among small caps:

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