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 Rosetta Stone, Inc. (NYSE:RST) fell more than 10% Tuesday morning, then partially recovered to close down around 4.4% after the company turned in disappointing fourth-quarter results.

So what: Quarterly revenue fell 1% year over year to $77.7 million, which translated to adjusted net income of $0.05 per share. Analysts, on average, were looking for adjusted earnings of $0.11 per share on sales of $82.41 million.

Now what: Even so, CEO Steve Swad pointed out while overall bookings remained flat in the face of declining North American retail sales, Rosetta Stone did manage to grow bookings for both its North American direct-to-consumer and Enterprise and Education channels by 7% and 47%, respectively. Swad also highlighted the company's December acquisitions of international language company Tell Me More, and Fit Brains creator Vivity Labs, both of which will serve to diversify Rosetta Stone's products and expand its global reach.

Even though Rosetta Stone may look expensive trading around 77 times this year's expected earnings, that's why I don't think investors should give up on the company just yet. Once the dust settles and Rosetta Stone manages to return to sustained GAAP profitability, the stock should still be able to reward patient shareholders over the long-term.

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.