Litronic Inc.

The Irvine provider of Internet security products said it lost $3.5 million, or 35 cents a share, for the first quarter, compared with a net loss of $973,000, or 25 cents a share, for the year-earlier period. Revenue increased to $4.7 million from $1.4 million. Revenue and expenses for the recent quarter include the results of Pulsar Data Systems, which was acquired in June.