Warrants (Tables)

9 Months Ended

Sep. 30, 2019

Proceeds From Issuance Of Preferred Stock Preference Stock And Warrants [Abstract]

Summary of Outstanding Warrants

The following table shows the common stock warrants outstanding as of September 30, 2019:

Shares of CommonStock Underlying Warrants		Exercise Price/Share		Expiration Date
	28,713	$	23.51	2024
	144,772		14.00	2022
	45,307		2.76	2026
	18,123		7.73	2028
	5,411,687		0.01	N/A