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

Amount of increase (decrease) 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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- 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

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Warrants (Details 1) - USD ($) $ in Thousands	3 Months Ended								4 Months Ended	12 Months Ended
Warrants (Details 1) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair value of warrant liability at beginning				$ 8,631					$ 42,500	$ 8,631
Increase (decrease) in fair value	$ (1,728)	$ 971	$ 207	5,678	$ (1,210)	$ 13,516	$ (1,350)	$ (4,887)		5,128	$ 6,069	$ 27,800
Fair value of warrant liability at ending	3,503				8,631					3,503	8,631
Level 3 [Member] \| Warrant Liability [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair value of warrant liability at beginning				$ 8,631				$ 14,700	42,500	8,631	14,700
Increase (decrease) in fair value									(27,800)	(5,128)	(6,069)
Fair value of warrant liability at ending	$ 3,503				$ 8,631				$ 14,700	$ 3,503	$ 8,631	$ 14,700