Elsewhere, Hanmi Financial ( HAFC) shares plummeted 15% to $1.81 on above-average volume. Jones Soda ( JSDA) retraced some of its recent gains, falling 13.9% to $1.74 on volume of more than 4 million shares, which was more than double normal volume.

On the upside, Neurocrine Biosciences ( NBIX) surged by 50 cents, or 11.2%, to $4.95 on volume of 2.39 million shares, nearly three times its average daily share volume.

-- Written by Robert Holmes in Boston.

Check out all of Thursday's high-volume, under-$5 stocks at the Dollar Store. View the Dollar Store portfolio on StockPickr.

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