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Business Acquisitions - Additional Information (Detail) - USD ($) $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Feb. 27, 2015 | Feb. 28, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Business Acquisition [Line Items] |  |  |  |
Increase in long-term liabilities |  |  | $ 2.0 |
Deferred grants, determined fair value |  |  | 0.0 |
Decreased the deferred grants fair value |  |  | 0.0 |
Decrease in goodwill |  |  | (10.7) |
Business acquisition, cash transferred |  |  | $ 20.1 | $ 223.5
Crescendo Biosciences, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total consideration transferred |  | $ 259.0 |  |
Business acquisition, cash transferred |  | 225.1 |  |
Elimination of intercompany balances related to accrued interest and term loan |  | 25.9 |  |
Fair value of purchase option granted |  | 8.0 |  |
Business acquisition, amount deposited into escrow account |  | 20.0 |  |
Share-based compensation to Crescendo employees |  | 6.9 |  |
Control bonuses paid to Crescendo employees |  | $ 5.7 |  |
Crescendo Biosciences, Inc. | Minimum |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Period of audit completion |  | 12 months |  |
Crescendo Biosciences, Inc. | Maximum |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Period of audit completion |  | 15 months |  |
German Clinic [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total consideration transferred | $ 20.1 |  |  |
Intangible asset amortization period for income tax purposes |  |  | 15 years |

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