Roku, Inc. (NASDAQ:ROKU) reported its first-quarter financial results after the bell Thursday. Here's a look at the highlights.  The Details: Roku reported quarterly losses of 35 cents per share, which beat the analyst consensus estimate of losses of 62 cents by 43.55%.  The company reported quarterly sales of $881.5 million, which beat the analyst consensus estimate of $848.616 million by 3.87% and represents an 18.96% increase year-over-year.  Roku reported 81.6 million streaming households in the ...