Fair Value Measurement - Assumptions Used for Determining Fair Values of Common Stock Warrants (Detail) - September 20, 2018 Offering [Member]	Mar. 31, 2022 $ / shares
Warrant Fair Value Black Scholes Method [Line Items]
Beginning stock price	$ 3.00
Exercise Price [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Measurement input	3.495
Expected Dividend Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Measurement input	0.00
Discount Rate-Bond Equivalent Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Measurement input	1.66
Expected Life [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Expected life (in years)	5 years 6 months
Expected Volatility [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Measurement input	150.33

Warrant fair value Black Scholes method.

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

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- Definition

Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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- Definition

Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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