Fair Value Measurements - Schedule of Assumptions used to Estimate Fair Value of Warrant Liability (Details) - Warrant Liability - Common Stock	Sep. 30, 2020	Sep. 26, 2017
Expected term
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability, measurement input, term	6 months	2 years
Risk-free interest rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Common stock warrant liability, measurement input	0.001	0.0153
Expected volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Common stock warrant liability, measurement input	0.8897	0.7897
Expected dividend yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Common stock warrant liability, measurement input	0	0

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.

No definition available.

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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=117815213&loc=d3e19207-110258

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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=117815213&loc=d3e19207-110258

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