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Components of Deferred Tax Assets, Deferred Tax Liabilities, and Liability for Unrecognized Tax Benefits Included in Allocation of Crescendo's Purchase Consideration (Detail) (USD $) | Jun. 30, 2014 | Jun. 30, 2013 | Feb. 28, 2014 Crescendo Biosciences, Inc.
--- | --- | --- | ---
Deferred tax assets: |  |  |
Net operating loss carryforwards | $ 76,986,000 | $ 8,336,000 | $ 70,048,000
Research and development credits | 11,207,000 | 5,367,000 | 5,815,000
Other, net | 312,000 | 643,000 | 312,000
Total gross deferred tax assets | 122,795,000 | 45,295,000 | 76,175,000
Less valuation allowance | (41,420,000) | (8,218,000) | (29,760,000)
Total deferred tax assets | 81,375,000 | 37,077,000 | 46,415,000
Deferred tax liabilities: |  |  |
Intangible assets | 71,750,000 | 438,000 | 72,005,000
Stock compensation expense |  |  | 4,443,000
Total deferred tax liabilities | 71,750,000 | 438,000 | 76,448,000
Net deferred tax liability |  |  | 30,033,000
Liability for unrecognized tax benefits | $ 24,238,000 | $ 10,718,000 | $ 14,180,000

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