DexCom (Nasdaq: DXCM) reported earnings May 2. Here are the numbers you need to know.

The 10-second takeaway
For the quarter ended March 31 (Q1), DexCom beat slightly on revenues and met expectations on earnings per share.

Compared to the prior-year quarter, revenue grew significantly and GAAP loss per share expanded.

Margins grew across the board.

Revenue details
DexCom notched revenue of $20.1 million. The 14 analysts polled by S&P Capital IQ foresaw net sales of $19.9 million on the same basis. GAAP reported sales were 42% higher than the prior-year quarter's $14.2 million.

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 -$0.19. The 12 earnings estimates compiled by S&P Capital IQ forecast -$0.19 per share. GAAP EPS were -$0.21 for Q1 compared to -$0.19 per share for the prior-year quarter.

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 46.7%, 1,060 basis points better than the prior-year quarter. Operating margin was -76.6%, 710 basis points better than the prior-year quarter. Net margin was -70.0%, 1,360 basis points better than the prior-year quarter.

Looking ahead
Next quarter's average estimate for revenue is $22.2 million. On the bottom line, the average EPS estimate is -$0.20.

Next year's average estimate for revenue is $94.4 million. The average EPS estimate is -$0.72.

Investor sentiment
The stock has a one-star rating (out of five) at Motley Fool CAPS, with 81 members rating the stock outperform and 98 members rating it underperform. Among 76 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 24 give DexCom a green thumbs-up, and 52 give it a red thumbs-down.

Of Wall Street recommendations tracked by S&P Capital IQ, the average opinion on DexCom is outperform, with an average price target of $12.13.

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