Commitments and Contingencies - Additional Information (Detail) - USD ($)	Jun. 30, 2020	Jun. 30, 2019
Other Commitments [Line Items]
Contingent liabilities	$ 0
Future commitments	83,000,000.0
Commitments expected to be incurred in fiscal 2020	20,500,000
Commitments expected to be incurred beyond fiscal 2020	62,500,000
Technology License Commitments
Other Commitments [Line Items]
Accrued milestone payments	0	$ 0
Technology License Commitments \| ARO-ENaC Program
Other Commitments [Line Items]
Accrued milestone payments	$ 900,000

Accrued milestone payments.

No definition available.

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- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

+ References

No definition available.

+ Details

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- Definition

Amount of purchase arrangement to be paid in second fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

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- Definition

Amount of purchase arrangement to be paid in remainder of current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment.

+ References

No definition available.

+ Details

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