Tesla Motors announced that it hit deliveries of 50,580 units of vehicles for the whole year of 2015.

According to CBC, the leading electric car company detailed its sales and said that it delivered 17,400 vehicles in the October to December quarter, which was at the low end of its 17,700 to 19,000 delivery target for that quarter.

It's interesting to note that, these deliveries were made even though Tesla Motors only makes two models: the Model S sedan, which sold a record 17,192 in the fourth quarter and the Model X crossover utility vehicle that only started shipping last September.

In a related report from the Los Angeles Times, Tesla's previous record was 11,580 deliveries, which it posted in last year's third quarter.

Tesla also said that it delivered 208 Model X vehicles in the fourth quarter as it ramps up production of its seven-passenger SUV with its distinctive falcon-wing doors.

In a statement, the company said, "Model X deliveries are in line with the very early stages on our Model X production ramp as we prioritize quality above all else."

It also said that it's currently producing about 238 units of Model X per week, which has a starting price of $80,000, compared to the Model S that costs only $72,000. Both models can cost more than $100,000, depending on variant -- making it out of range to most car buyers.

However, despite the rather strong sales numbers, the company's stock prices are lagging. According to the report, Tesla Motor's shares sank $16.60 or nearly seven percent on Monday.

According to USA Today, analyst James Albertine of Stifel said that the company's shares "would come under pressure" because of a lower ramp-up of the new Model X crossover than expected. Only 208 of the 17,400 vehicles that the company produces in the fourth quarter were the Model X.

Tesla explained that it was in limited production until it is sure that all of the issues have been ironed out of the vehicle so that problems will cease when the vehicle hits the mainstream market.

Albertine also said that fears of an "implied decline" in the company's directory of cars might foreshadow a lower demand. Moreover, the car maker's stock was not helped by the sell-off in the Shanghai stock market, since China has been a key market for the luxury electric cars.

The analyst added that his $400 prediction for Tesla shares was "premature," but the company remains in front of the pack when it comes to electric vehicle innovation.