Shares of Tesla popped as much as 7 percent at the open on Monday after the company reported late last week that it delivered 184,800 vehicles in the first quarter, higher than analyst estimates of about 168,000. That beat the prior quarter's record and had Wedbush analyst Daniel Ives calling the number a "paradigm changer" as he upgraded the stock to outperform on a new price target of $1,000. Later in the week, Tesla raised prices on the Model 3 and Model Y -- the fourth price change of the year -- amid reports that the automaker is facing production delays that could push deliveries back several weeks this quarter.