Shares of Guidance Software rose Tuesday based on the company’s report that quarterly revenue had reached $22.7 million, up 38 percent from the same period last year.

The Pasadena company had a net loss of $1.2 million or 5 cents per share for the second quarter, compared with a loss of $5.8 million or 25 cents per share for the same quarter last year.

The increased revenue mostly came from the May acquisition of Tableau LLC, a manufacturer of computer forensic hardware. The purchase complements Guidance’s main business of forensic software.

“With record second-quarter revenue and a lower cost structure reflecting changes we made in 2009, we increased productivity while growing our business,” Guidance Chief Executive Victor Limongelli said in a statement. “We are looking forward to continued progress in the third quarter.”

In mid-day trading on the Nasdaq Stock Exchange, shares of Guidance rose to $5.22, an increase of 59 cents or 13 percent.