Stockholders' Equity - Warrant Activity Including Activity Related To Pre-funded Warrants (Detail)	6 Months Ended
Jun. 30, 2022 $ / shares shares
Pre-funded Warrants [Member]
Number of Other than Option Shares
Outstanding, Beginning	2,300,000
Issued	24,379,673
Exercised	(2,300,000)
Outstanding, Ending	24,379,673
Common Stock Warrant [Member]
Number of Other than Option Shares
Outstanding, Beginning	18,302,244
Exercised	(4,299,270)
Outstanding, Ending	14,002,974
Warrant [Member]
Number of Other than Option Shares
Outstanding, Beginning	20,602,244
Issued	24,379,673
Exercised	(6,599,270)
Outstanding, Ending	38,382,647
Weighted Average Exercise Price
Outstanding, Beginning \| $ / shares	$ 1.22
Issued \| $ / shares	0.001
Exercised \| $ / shares	1.37
Outstanding, Ending \| $ / shares	$ 0.50

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

+ Details

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- References

No definition available.

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- Definition

Number of non-option equity instruments exercised by participants.

+ References

+ Details

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- Definition

Net number of non-option equity instruments granted to participants.

+ References

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- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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