Shares of ShotSpotter Inc. SSTI, -1.08% dipped 6% in extended trading Tuesday after the maker of gunfire locator technology reported fiscal third-quarter results. ShotSpotter reported a net loss of $949,000, or 8 cents a share, compared with a net loss of $566,000, or 5 cents a share, in the year-ago quarter. Revenue climbed 28% to $14.5 million from $11.4 million a year ago. Analysts surveyed by FactSet had expected net income of a penny a share on revenue of $15 million. ShotSpotter's stock is up 5% so far in 2021, while the broader S&P 500 index SPX, -0.35% has gained 25% this year.