CardioDynamics reported a loss of $682,000, or a penny a share, for the second quarter ended May 31, compared with net income of $958,000, or 2 cents a share, a year ago. The medical technology manufacturer said revenue for the quarter was $9.4 million, down 9% from a year ago. The company also said it's cutting 10% of its workforce, which will result in savings of $2 million annually. The stock was down 40 cents, or 17.7%, to $1.86 on Instinet.

Mattson Technology ( MTSN) lowered its second-quarter bookings forecast to $27 million from its previous forecast of $37 million to $42 million, citing changes in the timing of customer orders for advanced products. "With shortening cycle times and lumpy bookings, and given that a single tool can contribute up to 8% of our bookings, it takes just a few order timing changes to have a significant impact on our quarterly bookings levels," Mattson said. The leading supplier of advanced process equipment used to manufacture semiconductors said revenue and gross margin guidance for the quarter remain unchanged. The stock was down 31 cents, or 5.31%, to $6.95 in after-hours trading.

Electro Scientific Industries ( ESIO) reported a loss of $753,000, or 3 cents a share, for the fourth quarter ended May 28, vs. net income of $16.1 million, or 54 cents a share, a year ago. Revenue for the quarter was $45.7 million, down 44% compared with $81.8 million for the same period last year. Included in the fourth quarter was a $4.1 million charge resulting from the redemption of convertible notes. Analysts expected earnings of 9 cents a share on revenue of $46.9 million, according to Thomson First Call. The stock was down 35 cents, or 1.99%, to $17.20 in after-hours trading.

Symbol Technologies announced a restructuring plan under which it will cut about 700 jobs by year-end. The restructuring will result in quarterly savings of $15 million. Symbol Technologies said it now expects second-quarter earnings of 2 cents to 5 cents a share on revenue of $440 million, compared with its previous forecast of 7 cents to 9 cents a share on revenue in the range of $460 million to $470 million. For the full year, the company sees revenue growth of 3% to 6%, vs. previous guidance of the low end of 10% to 15%. The stock was down 87 cents, or 8.31%, to $9.60 on Instinet.

Charles & Colvard ( CTHR - Get Report) increased its second-quarter sales estimates to $9 million to $9.5 million, from its previous forecast of $7.7 million to $8.4 million. The jewelry industry supplier cited a pickup in billings. The stock was up $1.80, or 7.29%, to $26.50 on Instinet.

SigmaTel cut its earnings estimate because of a drop in NAND flash memory pricing and weak graduation and Father's Day sales. The company now expects to earn 29 cents to 33 cents a share on revenue of $68 million to $72 million, down from its previous guidance of 48 cents to 57 cents a share on revenue of $86 million to $95 million. Analysts expected earnings of 51 cents a share on revenue of $88.7 million. SigmaTel expects gross margin to be in line with the company's previous forecast of 56%. The stock was up $1.17, or 6.6%, to $18.91 in after-hours trading.

Impac Mortgage Holdings ( IMH - Get Report) said it would re-evaluate its dividend policy after making its second-quarter payout of 75 cents on July 15. "While the company has declared a dividend of 75 cents per common share for the second quarter, we expect estimated taxable income for the quarter to be less than the dividend declared," said Joseph R. Tomkinson, chairman and CEO of Impac Mortgage Holdings. "Based on current trends, the company expects to re-evaluate its dividend policy during the third quarter of 2005," he said. The stock was unchanged at $21.55.

National Fuel Gas Company ( NFG - Get Report) announced that its wholly owned subsidiary, Horizon Energy Development B.V., will sell its majority interest in United Energy to Czech Energy Holding for $116.3 million. The company said it expects the deal to close before the end of the fiscal year due to limited regulatory approvals involved. National Fuel expects to realize a one-time gain of approximately $25 million, or 30 cents a share. The stock was unchanged at $28.62.