Number of shares of equity interests issued or issuable to acquire entity.

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-Name Accounting Standards Codification
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-SubTopic 30
-Section 50
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-Subparagraph (b)(4)
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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

Face amount or stated value per share of common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 230
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Merger with Aravive Biologics, Inc. - Additional Information (Detail) - $ / shares	Oct. 12, 2018	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Common stock, par value		$ 0.0001	$ 0.0001
Aravive Biologics [Member] \| Common Stock [Member]
Business Acquisition [Line Items]
Aggregate consideration issuable in merger, shares	5,141,915
Aravive Biologics [Member] \| Agreement and Plan of Merger and Reorganization [Member]
Business Acquisition [Line Items]
Common stock, par value	$ 0.0001
Aravive Biologics [Member] \| Agreement and Plan of Merger and Reorganization [Member] \| Common Stock [Member]
Business Acquisition [Line Items]
Shares issued upon conversion of stock	2.2801
Aggregate consideration issuable in merger, shares	5,141,915