Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Value of input used to measure embedded derivative liability.

+ 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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+ References

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

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Fair Value Measurement of Assets and Liabilities - Binomial Lattice Model and Assumptions (Details) - Level 3 - Interest make-whole payment	Jun. 30, 2020	May 12, 2020	Sep. 30, 2021 $ / shares	Dec. 31, 2020 $ / shares
Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input		0.50	0.50
Stock price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Stock price			$ 6.66	$ 15.47
Credit spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input		0.1925	0.1853
Term
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Term	3 years 7 months 2 days	4 years 4 months 2 days
Dividend yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input		0	0
Risk-free rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input		0.0030	0.0066