The stock fell to $18.25 early in the trading session, its lowest point in nearly five years. Shares fell 20.8 percent, or $5.60, to close at $21.34.
Late Thursday, the company said its initial first-quarter and full-year profit expectations would fall short because of lower sales in North America. It expects profit between 44 cents and 46 cents per share on revenue of about $100 million. In February, the company said it expected profit between 63 cents and 66 cents per share on revenue between $105 million and $109 million.
