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Fair Value Measurements - Summary of Reconciliation of Beginning and Ending Balances for Liabilities Measured at Fair Value on Recurring Basis (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Warrant liabilities
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 51,156
Gain (loss) adjustment to fair value	(1,296)
Ending balance	49,860
Derivative liabilities
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning balance	5,954
Adjustment for conversion of April 2020 Notes	(3,426)
Gain (loss) adjustment to fair value	90
Ending balance	$ 2,618

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- Definition

Derivative fair value gain (loss) from mark to market adjustment.

+ References

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- Definition

Fair value measurement with unobservable inputs reconciliation recurring basis liability adjustment for conversion of notes.

+ References

No definition available.

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- Definition

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+ References

No definition available.

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- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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