Warrants

9 Months Ended

Sep. 30, 2019

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

Warrants

Note 12. Warrants

In connection with certain of its redeemable convertible preferred stock issuances, convertible debt financings and other financing arrangements, the Company has issued warrants for shares of its common stock and various issues of its redeemable convertible preferred stock which have since been converted to common stock warrants. There have been no significant modifications or financial events relating to the warrants that were issued prior to December 31, 2018 since the disclosures made by the Company in its Annual Report on Form 10-K, filed with the SEC on March 7, 2019, other than the expiration of a warrant for 931 shares of common stock, in accordance with its terms, in March 2019.

In September 2019, in connection with the Securities Purchase Agreement (see Note 13), the Company issued and sold an aggregate of 5,411,687 pre-funded warrants exercisable for an aggregate of 5,411,687 shares of common stock. The total exercise price of the pre-funded warrants is $0.65 per share, $0.64 of which was pre-funded and paid to the Company upon issuance of the pre-funded warrants. The remaining exercise price of the pre-funded warrants is $0.01 per share. The pre-funded warrants are immediately exercisable and do not expire. As the shares underlying the pre-funded warrants are issuable for nominal consideration of $0.01 per share, they are considered outstanding for purposes of the calculation of loss per share, as required by ASC 260-10-45-13.

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