iRobot

(IRBT) - Get Report

was plunging more than 14% in after-hours trading Monday after it swung to a loss of $1.8 million in the fourth quarter, or 8 cents a share, on $61.1 million in sales, even though these figures met Thomson Financial's Wall Street estimates.

Last year, the Burlington, Mass.-based robot maker had a profit of $12,000, or break-even a share, on sales of $46.5 million. Looking ahead, the company expects to see $225 million to $235 million in revenue, which is at least $14.8 million below the consensus. Shares were sinking $2.79 to $16.30.

Interactive Intelligence

(ININ)

came in a penny under per-share earnings estimates for the fourth quarter, posting income of just $1.6 million, or 8 cents a share. Last year, the Indianapolis-based business software company made $1.8 million, or a dime a share. Revenue rose 36% from a year ago to $23.9 million, but shares were losing $2.14, or 10.5%, to $18.20 in recent after-hours action.

Shares of

MoSys

(MOSY) - Get Report

slipped after the semiconductor company posted fourth-quarter profits of $567,000, or 2 cents a share, missing per-share Street projections by 2 cents. Last year, the Sunnyvale, Calif., company lost $1.1 million, or 4 cents a share, in the fourth quarter. MoSys stock was losing 29 cents, or 3.6%, to $7.70.

Priceline

(PCLN)

jumped after the discount travel Web site doubled its fourth-quarter income and hurtled past fourth-quarter Wall Street estimates. Earnings came to $22.4 million, excluding several items, or 58 cents a share, compared with $11.4 million, or 28 cents a share, a year ago. Analysts were seeking 40 cents a share. Sales were up 27.5% year over year to $260.1 million, topping projections by 24.1 million. Shares were gaining $2.77, or 6%, to $48.70.

Marketing-services company

Rainmaker Systems

(RMKR)

swung to a fourth-quarter profit of $943,000, or 6 cents a share, on sales of $14.4 million. A year ago it lost $310,000, or 3 cents a share, on $9.1 million in sales. Analysts were looking for a nickel a share on $13.6 million in revenue. Shares of the Campbell, Calif., company were up 55 cents, or 5.7%, to $10.25.

Taiwan's

Himax Technologies

(HIMX) - Get Report

was higher on mounting fourth-quarter profits. Income came to $29.4 million, or 15 cents a share, compared with $17 million, or 9 cents a share, a year ago. Analysts were seeking 11 cents a share. Himax, which makes semiconductors for flat-panel displays, was climbing 18 cents, or 3.7%, to $4.99.

Matrixx

( MTXX), which makes the Zicam cold-and-allergy product line, was higher after the Phoenix-based company sharply narrowed its losses to $463,000, or a nickel a share, from a year-ago downside of $3 million, or 31 cents a share. The Street was targeting per-share losses of 11 cents. Revenue was down 18% to $36.2 million, just shy of the $36.7 million mean estimate.

The company also announced it will adjust its fiscal year to begin on April 1 this year in order to properly align with the entire cold season, which currently cuts across two fiscal years. Shares were rising 49 cents, or 2.9%, to $17.32.