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Summary of Significant Accounting Policies - Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance January 1, 2020	$ 0
Issuance of warrants, January 2020	1,636
Settlements from exercise	(1,317)
Change in fair value of warrant liabilities	1,086	$ 0
Warrant liability - modification	(1,405)
Balance September 30, 2020	$ 0	$ 0

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- Definition

Adjustments to Additional Paid in Capital, Warrant Reclassified

+ References

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Amount of expense (income) related to adjustment to fair value of warrant liability.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Section 45
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of issuances 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.

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Amount of settlements 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.

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Amount of the liabilities, classified as other, for deferred compensation arrangements payable within one year or the operating cycle, if longer.

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