Repurchase of noncontrolling interest price per share.

No definition available.

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

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- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).

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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.

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

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- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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- Definition

Number of new stock issued during the period.

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- Definition

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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Non-Controlling Interests - Spero Gyrase - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2019	Dec. 31, 2018	Nov. 30, 2019
Noncontrolling Interest [Line Items]
Common stock issued, aggregate fair value		$ 15,316,000
Research and development expense		$ 65,775,000	$ 33,885,000
Non-controlling interests			355,000
Spero Gyrase, Inc. [Member]
Noncontrolling Interest [Line Items]
Repurchase ownership percentage		100.00%		100.00%
Repurchase price per share		$ 0.001		$ 0.001
Non-controlling interests		$ 0	$ 400,000
Spero Gyrase, Inc. [Member] \| Aviragen Therapeutics, Inc. [Member]
Noncontrolling Interest [Line Items]
Common stock, shares issued	200
Common stock issued, aggregate fair value	$ 1,100,000
Ownership percentage	20.00%
Spero Gyrase, Inc. [Member] \| Aviragen Therapeutics, Inc. [Member] \| Technology-Based Intangible Assets [Member]
Noncontrolling Interest [Line Items]
Research and development expense	$ 1,100,000