Fair Value Fair Value - Quantitative Information Used in Fair Value Calculation of Level 3 Liabilities (Details) - Common stock warrant liability - Black-Scholes model	Apr. 03, 2020 $ / shares	Sep. 27, 2019 $ / shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and rights outstanding term	21 days	1 year 2 months 12 days
Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability measurement input	0.0015	0.0171
Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability measurement input	0.621	0.614
Exercise price (in dollars per share)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability measurement input	14.05	14.05
Stock price (in dollars per share)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability measurement input	18.55	21.68
Dividend rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
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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- 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=117815213&loc=d3e19207-110258

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