What happened Shares in Nevro Corp. (NYSE: NVRO) are rallying 10.5% at 12:30 p.m. EDT after the company gave investors an early peek at its second-quarter financials, So what The company is knee-deep in growth mode following the launch of Senza in 2015, a device that uses neurostimulation of the spinal cord to reduce chronic pain in patients. IMAGE SOURCE: GETTY IMAGES. In the second quarter, global sales are expected to officially clock in between $77.5 million to $78 million, up from $55.4 million one-year ago. Revenue in the U.S. is anticipated to be between $62.7 million and $63 million when the accounting dust settles. For the full year, management is reaffirming its target for sales of between $310 million to $320 million. For comparison, revenue was $228.5 million in 2016, up 228% from 2015. Now what Marketing Senza hasn't been cheap. Operating expenses grew to $176 million in 2016 from $104 million in 2015, and while the company didn't offer up preliminary numbers on the bottom line today, heavy spending in the first quarter kept the company firmly in the red. In Q1, the company's investment in personnel caused operating expenses to come in 70% higher than last year. As a result, its loss from operations was $13.1 million, or $0.50 per share in the period. While it's good news to see that the company continues to grow quickly, investors shouldn't ignore the fact that sales growth is decelerating. That's not unexpected -- at some point, however, investors will want to see a clear runway to profitability.10 stocks we like better than NevroWhen investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* David and Tom just revealed what they believe are the 10 best stocks for investors to buy right now... and Nevro wasn't one of them! That's right -- they think these 10 stocks are even better buys. Click here to learn about these picks! *Stock Advisor returns as of June 5, 2017Todd Campbell has no position in any stocks mentioned. His clients may have positions in the companies mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.