Rhino Resource Partners (NYSE: RNO) reported earnings on May 3. Here are the numbers you need to know.

The 10-second takeaway
For the quarter ended March 31 (Q1), Rhino Resource Partners whiffed on revenues and missed estimates on earnings per share.

Compared with the prior-year quarter, revenue dropped slightly and GAAP earnings per share grew significantly.

Margins expanded across the board.

Revenue details
Rhino Resource Partners tallied revenue of $81.9 million. The four analysts polled by S&P Capital IQ predicted a top line of $93.4 million on the same basis. GAAP reported sales were 1.1% lower than the prior-year quarter's $82.8 million.

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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 $0.32. The four earnings estimates compiled by S&P Capital IQ predicted $0.38 per share. GAAP EPS of $0.32 for Q1 were 33% higher than the prior-year quarter's $0.24 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 28.7%, 340 basis points better than the prior-year quarter. Operating margin was 9.2%, 150 basis points better than the prior-year quarter. Net margin was 11.0%, 360 basis points better than the prior-year quarter.

Looking ahead
Next quarter's average estimate for revenue is $92.1 million. On the bottom line, the average EPS estimate is $0.37.

Next year's average estimate for revenue is $372.0 million. The average EPS estimate is $1.55.

Investor sentiment

Of Wall Street recommendations tracked by S&P Capital IQ, the average opinion on Rhino Resource Partners is outperform, with an average price target of $25.25.

Seth Jayson had no position in any company mentioned here at the time of publication. You can view his stock holdings. He is the co-advisor of Motley Fool Hidden Gems, which provides new small-cap ideas every month, backed by a real-money portfolio. Try any of our Foolish newsletter services free for 30 days. We Fools don't 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.