Convertible Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended			9 Months Ended
	Jun. 30, 2020	Feb. 29, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Temporary Equity [Line Items]
Gross proceeds received from sale of convertible preferred stock						$ 104,837	$ 25,016
Issuance costs		$ 200		$ 228	$ 34	$ 3,419
Series B preferred stock
Temporary Equity [Line Items]
Shares issued		221,399,223
Share price		$ 0.47455
Gross proceeds received from sale of convertible preferred stock		$ 105,100
Common Stock
Temporary Equity [Line Items]
Shares issued	14,375,000		14,375,000
Share price	$ 17.00		$ 17.00
Common stock shares converted	18,969,672		18,969,672