Common Stock Warrants - Additional Information (Details) - Class B common stock - $ / shares	Mar. 31, 2020	Dec. 31, 2019
Preferred stock warrants
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)	481,181
Warrant exercise price (in dollars per share)	$ 27.78
Common stock warrants
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)		12,940
Warrant exercise price (in dollars per share)		$ 38.64