Fair Value Measurements and Fair Value of Financial Instruments - Summary of Changes in Estimated Fair Value of Level 3 Financial Instruments (Details) - Warrant Liability - Level 3 - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2020	Jun. 30, 2020
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance	$ 450	$ 450
Change in fair value	179
Warrant liability write-off upon IPO		$ (629)
Balance	$ 629