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Warrants to Purchase Common Stock - Measurement Inputs (Details)	Sep. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Dividend yield
Class of Warrant or Right [Line Items]
Measurement input (percent)	0.0000		0.0000
Expected volatility
Class of Warrant or Right [Line Items]
Measurement input (percent)	0.4993		0.4993
Risk-free interest rate
Class of Warrant or Right [Line Items]
Measurement input (percent)	0.0031		0.0017
Common Stock Warrants
Class of Warrant or Right [Line Items]
Warrant term (in years)		4 years	5 years
September 2020 Common Stock Warrants
Class of Warrant or Right [Line Items]
Warrant term (in years)			5 years
September 2020 Common Stock Warrants | Dividend yield
Class of Warrant or Right [Line Items]
Measurement input (percent)			0.000
September 2020 Common Stock Warrants | Expected volatility
Class of Warrant or Right [Line Items]
Measurement input (percent)			0.500
September 2020 Common Stock Warrants | Risk-free interest rate
Class of Warrant or Right [Line Items]
Measurement input (percent)			0.003
March 2021 Common Stock Warrants
Class of Warrant or Right [Line Items]
Warrant term (in years)	4 years
March 2021 Common Stock Warrants | Dividend yield
Class of Warrant or Right [Line Items]
Measurement input (percent)	0.000
March 2021 Common Stock Warrants | Expected volatility
Class of Warrant or Right [Line Items]
Measurement input (percent)	0.500
March 2021 Common Stock Warrants | Risk-free interest rate
Class of Warrant or Right [Line Items]
Measurement input (percent)	0.006

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- Definition

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+ References

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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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