NEW YORK ( TheStreet) -- Several small-cap stocks were poised to move on above-average volume during Tuesday's session

Extreme Networks ( EXTR) tumbled by 38 cents, or 13.2%, to $2.49 in the premarket session after the company on late Monday said fiscal first-quarter net revenue is expected to be approximately $66 million, well below the Thomson Reuters consensus of $80.4 million. The three-month average daily volume for the stock is 403,000, according to Yahoo! Finance.

Allos Therapeutics ( ALTH) fell by 25 cents, or 3.6%, to $6.63 in the premarket session after the company announced an 11-million share common stock offering with an option for underwriters to buy an additional 1.65 million shares. The sale of all 12.65 million shares would raise about $87 million, based on Monday's closing price. The three-month average daily volume for Allos is two million, according to Yahoo! Finance.

Ballard Power Systems ( BLDP) jumped by 17 cents, or 7%, to $2.60 in the premarket session after the company late Monday announced the introduction of the first bus in British Columbia Transit's fleet of 20 hydrogen fuel cell buses. BC Transit's fleet will become the largest single deployment of zero-emission fuel cell buses worldwide and it is powered by Ballard's heavy-duty fuel cell module. The three-month average daily volume for Ballard is 319,000, according to Yahoo! Finance.

Trident Microsystems ( TRID) surged 27 cents, or 10.1%, to $2.95 in the premarket session. On Monday, the stock jumped on above-average volume after Trident said it will acquire the television and set-top box systems business of NXP Semiconductors. On Tuesday, Needham Financial upgraded the stock to buy from hold and offered a stock target price of $5. The three-month average daily volume for Trident is 1.2 million, according to Yahoo! Finance.

Cirrus Logic ( CRUS) was up 50 cents, or 9.8%, to $5.63 in the premarket session after the company late Monday raised its second-quarter revenue guidance to $55.7 million, up from its previous range of $48 million to $52 million. Analysts expect revenue in the second quarter of $49.8 million, according to Thomson Reuters. Cirrus said the revenue increase comes on better-than-expected demand for its audio products. The three-month average daily volume for Cirrus is 636,000, according to Yahoo! Finance.

Fonar ( FONR) jumped by $1.25, or 58.5%, to $3.40 in the premarket session after the company reported full-year 2009 earnings of 21 cents a share, swinging from a year-ago loss of $2.76 a share. Revenue jumped 12% from a year ago to $39.7 million. Total costs and expenses related to operations decreased 23%, the company said. The three-month average daily volume for Fonar is only 17,000, according to Yahoo! Finance.

NutriSystem ( NTRI) jumped by $3.67, or 24.4%, to $18.72 in the premarket session a day after the company said it would bring its 14-Day Starter Program to Wal-Mart ( WMT) shelves later this week. The three-month average daily volume for NutriSystem is 365,000, according to Yahoo! Finance.

-- Written by Robert Holmes in New York.