What happened 

Shares of defense company Kratos Defense & Security Solutions, Inc. (NASDAQ:KTOS) jumped 43.1% in 2017, according to data provided by S&P Global Market Intelligence, as the company began to grow again. Kratos is still losing money, but there were enough positive signs that investors pushed shares higher. 

So what 

Momentum began to build in the drone business in 2017, which was the real highlight of the year. In the third quarter, the most recent that's been reported, unmanned systems revenue was up 127.3% to $41.6% and the book to bill ratio for the quarter was 1.4 to 1.0. Government Solutions and Public Safety & Security also showed some growth, although it wasn't as explosive as the drones business. 

Drone flying above the clouds.

Image source: Getty Images.

What investors didn't see was Kratos turn the corner to profitability in 2017. Net loss for the first nine months of 2017 was $20.3 million and given guidance of $15.4 million to $17.4 million in adjusted EBITDA, it'll be near breakeven in the fourth quarter as well

What investors have clung to in 2017 was the idea that Kratos' business is going to begin gaining momentum, which looks likely heading into 2018. 

Now what 

There's no question Kratos Defense & Security Solutions' stock had a great year in 2017, but the picture early in 2018 is less clear. The company is still losing money and it's not clear when that will change. As fellow Fool Rich Smith pointed out last summer, management expected to be profitable in Q2 2017, which didn't happen. Until we see some consistent profitability it'll be tough to see the stock as a value and that's what has me cautious early in 2018. 

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.