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Acquisitions - Pro Forma Results of Acquisitions (Detail) - Counsyl Inc [Member] - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |
Revenue | $ 195.1 | $ 216.8 | $ 381.4 | $ 429.3
Income (loss) from operations | (8.8) | 6.1 | (29.7) | 17.6
Net income (loss) | $ (8.3) | $ 2.6 | $ (28.9) | $ 11.2
Earnings (loss) per share, basic | $ (0.11) | $ 0.04 | $ (0.39) | $ 0.15
Earnings (loss) per share, diluted | $ (0.11) | $ 0.03 | $ (0.39) | $ 0.15

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