Red Robin Gourmet Burgers (Nasdaq: RRGB) reported earnings on May 21. Here are the numbers you need to know.

The 10-second takeaway
For the quarter ended April 21 (Q1), Red Robin Gourmet Burgers met expectations on revenues and met expectations on earnings per share.

Compared to the prior-year quarter, revenue expanded slightly. GAAP earnings per share dropped.

Gross margins grew, operating margins dropped, net margins dropped.

Revenue details
Red Robin Gourmet Burgers booked revenue of $306.3 million. The 13 analysts polled by S&P Capital IQ foresaw revenue of $306.9 million on the same basis. GAAP reported sales were the same as the prior-year quarter's.

Source: S&P Capital IQ. Quarterly periods. Dollar amounts in millions. Non-GAAP figures may vary to maintain comparability with estimates.

EPS details
EPS came in at $0.66. The 14 earnings estimates compiled by S&P Capital IQ anticipated $0.66 per share. GAAP EPS of $0.66 for Q1 were 7.0% lower than the prior-year quarter's $0.71 per share.

Source: S&P Capital IQ. Quarterly periods. Non-GAAP figures may vary to maintain comparability with estimates.

Margin details
For the quarter, gross margin was 22.8%, 30 basis points better than the prior-year quarter. Operating margin was 4.4%, 90 basis points worse than the prior-year quarter. Net margin was 3.1%, 40 basis points worse than the prior-year quarter. (Margins calculated in GAAP terms.)

Looking ahead
Next quarter's average estimate for revenue is $240.2 million. On the bottom line, the average EPS estimate is $0.65.

Next year's average estimate for revenue is $1.02 billion. The average EPS estimate is $2.22.

Investor sentiment
The stock has a three-star rating (out of five) at Motley Fool CAPS, with 249 members out of 311 rating the stock outperform, and 62 members rating it underperform. Among 106 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 91 give Red Robin Gourmet Burgers a green thumbs-up, and 15 give it a red thumbs-down.

Of Wall Street recommendations tracked by S&P Capital IQ, the average opinion on Red Robin Gourmet Burgers is outperform, with an average price target of $47.85.

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Seth Jayson had no position in any company mentioned here at the time of publication. You can view his stock holdings here. He is co-advisor of Motley Fool Hidden Gems, which provides new small-cap ideas every month, backed by a real-money portfolio. The Motley Fool recommends Red Robin Gourmet Burgers. 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.