In February 2020, the Company sold 15,000,000 shares of common stock in an underwritten public offering at a price of $1.45 per share for gross proceeds of $21.75 million. Underwriter discounts and commissions and other share issue costs totaled approximately $1.8 million.

At the Annual Meeting of Stockholders (the “Annual Meeting”) held on June 23, 2020, the Company’s stockholders approved the adoption of an amendment to the Company’s Certificate of Incorporation, to increase the number of authorized shares of its Common Stock from 150,000,000 shares to 300,000,000 shares. The Company filed the Certificate of Amendment on June 23, 2020.

In January 2019, the Company entered into an at-the-market program (the “ATM Program”) with B. Riley FBR Inc. Pursuant to the ATM Program, under a Form S-3 shelf registration statement that was declared effective by the SEC in December 2018, the Company may, at its option, offer and sell shares of its Common Stock from time to time for an aggregate offering price of up to $20.0 million. The Company will pay the sales agent a commission of up to 3.0% of the gross proceeds from any future sales of such shares. On July 30, 2020, the Company notified B. Riley FBR Inc. that it was terminating the ATM Program in accordance with its terms, effective as of August 4, 2020.

The Company did not sell any shares of its Common Stock pursuant to the ATM program during each of the three and six months ended June 30, 2020 and 2019, respectively.

In April 2019, the Company sold 10,526,500 shares of common stock in an underwritten public offering at a price of $1.90 per share for gross proceeds of $20.0 million. Underwriter discounts and commissions and other share issue costs totaled approximately $1.7 million.

The following table provides a reconciliation of fixed price warrants to purchase shares of the Company’s Common Stock for the six months ended June 30, 2020 and 2019, respectively:

	Six Months Ended June 30,
	2020				2019
			Weighted				Weighted
			Average				Average
	Number of		Exercise		Number of		Exercise
	Warrants		Price		Warrants		Price
Balance at beginning of period		486,812	$	1.23		486,812	$	1.23
Expired		—		—		—		—
Balance and exercisable at end of period		486,812	$	1.23		486,812	$	1.23

Pursuant to a credit agreement, the Company issued the SWK Warrant to purchase (i) 409,091 Initial Advance Warrant Shares on March 28, 2018 at an exercise price of $1.10 per share with a seven-year term and (ii) 77,721

Additional Advance Warrant Shares on June 26, 2018 at an exercise price of $1.93 per share with a seven-year term. At June 30, 2020, the weighted average remaining life of the warrants was approximately 4.79 years.