Description of Business, Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Reconciliation of Warrant Liability Measured at Fair Value Using Level 3 Significant Unobservable Inputs (Details) - Level 3 - Preferred Stock Warrants $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 674
Change in fair value	1,268
Reclassification of preferred stock warrant liability to equity	$ (1,942)