Warrants (Tables)

9 Months Ended

Sep. 30, 2020

Warrants and Rights Note Disclosure [Abstract]

Summary of the Number of Shares Issuable Upon Exercise of Outstanding Warrants and the Terms and Accounting Treatment for the Outstanding Warrants

Below is a summary of the number of shares issuable upon exercise of outstanding warrants and the terms and accounting treatment for the outstanding warrants (in thousands, except per share data):

	Warrants as of
			Weighted- Average Exercise			Balance Sheet Classification
	September 30, 2020	December 31, 2019	Price Per Share		Expiration	September 30, 2020	December 31, 2019
Warrants to purchase common stock	—	39	$	5.88	July 9, 2020	N/A (1)	Liability