Ambarella (AMBA 4.44%) stock soared nearly 19% Wednesday morning after reporting a strong earnings beat last night. The stock has since given back about half its gains, but as of 11:20 a.m. ET is still up 7.7%.Analysts had forecast Ambarella to earn $0.04 per share on $79 million in sales. In fact, the company reported Q3 earnings of $0.11 per share, and sales of $82.6 million. Adding to the good news, Ambarella raised guidance for Q4 sales. Ambarella Q3 earnings reflect AI gainsOnce upon a time, Ambarella ...