Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of Rockwell Medical (NASDAQ:RMTI), a biopharmaceutical company focused on developing therapies to treat end-stage renal disease and chronic kidney disease, fell as much as 10% after the company reported its first-quarter earnings results after the closing bell last night.

So what: For the quarter, Rockwell Medical reported revenue of $13 million, a 5% increase over the year-ago quarter, as gross profit jumped 31%, to $1.7 million, and research and development expenses tumbled 64%, to just $4.6 million. The company's net loss for the quarter was practically halved, down 49%, to $7.8 million, or $0.20 per share, from $15.4 million, or $0.72 per share in Q1 2013. By comparison, Wall Street was anticipating a narrower net loss of just $0.14 per share.

Now what: While Rockwell didn't go into a lot of detail about its earnings results, the only factor that really had a demonstrable change was its reduced R&D expenses with the absence of its Triferic trial costs. While investors might feel enticed to duck and cover based on today's wider loss, they should really be focused on the outcome of Rockwell's new drug application filing for Triferic as an iron replacement therapy during dialysis. Triferic performed remarkably well in trials, and my personal expectation is that it'll be approved by the Food and Drug Administration. With annual peak sales expected to be $150 million-$250 million for Triferic (if approved), and the company's costs coming down considerably, I suspect there could be decent upside in shares over the long run following today's swoon.

Rockwell Medical may have plenty of potential, but even if could struggle to keep pace with this top stock over the long run
Give me five minutes, and I'll show how you could own the best stock for 2014. Every year, The Motley Fool's chief investment officer handpicks one stock with outstanding potential. But it's not just any run-of-the-mill company; it’s a stock perfectly positioned to cash in on one of the upcoming year's most lucrative trends. Last year, his pick skyrocketed 134%. And previous top picks have gained upwards of 908%, 1,252%, and 1,303% during the subsequent years! Believe me, you don't want to miss what could be his biggest winner yet! Just click here to download your free copy of "The Motley Fool's Top Stock for 2014" today.

Sean Williams has no material interest in any companies mentioned in this article. You can follow him on CAPS under the screen name TMFUltraLong, track every pick he makes under the screen name TrackUltraLong, and check him out on Twitter, where he goes by the handle @TMFUltraLong.

Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.