Updated from 1:41 p.m. EDT with new stock prices

Small-cap stocks, sharing the broader market's moodiness, couldn't find reason to rise Monday. The Russell 2000 lost 0.7% to 735.44, and the S&P SmallCap 600 fell 0.5% to 388.43.

Shares of Rimage ( RIMG), a Minneapolis maker of duplication systems for CDs, DVDs and laser discs, tumbled to new lows, falling 22.1% to $13.50. The company lowered is second-quarter earnings guidance to between 9 cents and 12 cents a share on revenue of $20 million to $22 million. Rimage had previously forecast EPS of 22 cents to 27 cents and revenue of $24 million to $26 million. Two analysts surveyed by Thomson Reuters are looking for 23 cents a share, and one analyst expects revenue of $24.9 million.

Shanghai-based fabless semiconductor company Spreadtrum Communications ( SPRD) gave up 16.2% to $7.84. Roth Capital downgraded the stock to hold from buy.

Taser ( TASR), which makes electronic control devices designed to zap criminals and others, also plunged to a new 52-week low, losing 11.3% to $6.12. The Scottsdale, Ariz.-based company saw rival Stinger Systems move for dismissal of a patent infringement case Taser had filed. In a separate case, a jury found extended application of a Taser device responsible for 15% of an arrest-related death. The jury awarded about $1 million in compensatory damages and $5.2 million in punitive damages against Taser.

On the winning side, Krispy Kreme Doughnut ( KKD), a branded retailer and wholesaler of doughnuts based in Winston-Salem, N.C., announced first-quarter earnings of $4 million, or 6 cents a share, vs. a loss of $7.4 million, or 12 cents a share, a year ago. Revenue declined 6.6% year over year to $103.6 million. Shares gained 12.9% to $3.86.

Cost Plus ( CPWM) shares climbed 9.2% to $3.33. The Oakland, Calif.-based furniture retailer announced Pier 1 Imports ( PIR) had proposed to buy Cost Plus for $4 a share in stock. Cost Plus is reviewing the unsolicited offer.

Finally, Nymox ( NYMX), a Hasbrouck Heights, N.J., pharmaceutical company, tacked on 28.4% to $3.98. The company announced it had started phase III development for NX-1207, an investigational product for the treatment of benign prostatic hyperplasia.

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