Note 10 - Equity Offerings

9 Months Ended

Sep. 30, 2020

Notes to Financial Statements

Stockholders' Equity Note Disclosure [Text Block]

10. Equity Offerings

On August 12, 2019, the Company entered into a Controlled Equity Offering Sales Agreement (the “2019 Sales Agreement”) with Cantor Fitzgerald & Co. (“Cantor”) pursuant to which the Company may sell from time to time, at its option, up to an aggregate of $25.0 million, shares of the Company’s common stock, through Cantor, as sales agent (the “2019 ATM Offering”). Pursuant to the Sales Agreement, sales of the common stock were made under the Company’s previously filed Registration Statement on Form S-3, which registration statement expired in May 2020. The aggregate compensation payable to Cantor was 3.0% of the aggregate gross proceeds from each sale of the Company’s common stock.

The following table summarizes the total sales under the 2019 ATM Offering for the period indicated (in thousands except for share and per share amounts):

	For the Nine Months Ended September 30, 2020
Total shares of common stock sold		6,687,846
Average price per share	$	1.73
Gross proceeds	$	11,558
Commissions earned by Cantor		346
Net proceeds	$	11,212

Public Offerings of Securities

On March 10, 2020, the Company closed the March 2020 Public Offering with Ladenburg Thalmann & Co. Inc. as underwriter and sold an aggregate of 14,121,766 Class A Units at a public offering price of $0.68 per Class A Unit and 7,937,057 Class B Units at a public offering price of $0.68 per Class B Unit. Each Class A Unit consists of one share of the Company’s common stock, one warrant to purchase one share of common stock that expires on the first anniversary of the date of issuance (collectively, the “Series C Warrants”), and one warrant to purchase one share of common stock that expires on the fifth anniversary of the date of issuance (collectively, the “Series D Warrants”). Each Class B Unit consists of one share of Series A Convertible Preferred Stock, par value $0.01 per share (the “Series A Preferred Stock”), convertible into one share of common stock, a Series C Warrant to purchase one share of common stock and a Series D Warrant to purchase one share of common stock. The Class A Units and Class B Units have no stand-alone rights and were not certificated or issued as stand-alone securities. The shares of common stock, Series A Preferred Stock, Series C Warrants and Series D Warrants are immediately separable. In addition, the underwriter for the public offering exercised an overallotment option and purchased 3,308,823 Series C Warrants and 3,308,823 Series D Warrants.

The shares of Series A Preferred Stock rank on par with the shares of the common stock, in each case, as to dividend rights and distributions of assets upon liquidation, dissolution or winding up of the Company. With certain statutory exceptions, as described in the Series A Preferred Stock Certificate of Designation, the shares of Series A Preferred Stock have no voting rights. Each share of Series A Preferred Stock is convertible at any time at the holder’s option into one share of common stock, which conversion ratio will be subject to adjustment for stock splits, stock dividends, distributions, subdivisions and combinations and other similar transactions as specified in the Series A Preferred Stock Certificate of Designation.

The net proceeds to the Company from the March 2020 Public Offering were approximately $13.5 million, after deducting underwriting discounts and commissions and estimated offering expenses payable by the Company. All shares of Series A Preferred Stock were converted into 7.9 million shares of common stock prior to June 30, 2020. Approximately 4.9 million Series C Warrants were exercised during the nine months ended September 30, 2020, generating net proceeds of $3.3 million. The Class A Units, the Class B Units, the Series A Preferred Stock, the Series C Warrants and the Series D Warrants (together with the shares of common stock underlying the shares of Series A Preferred Stock and such warrants) were offered under the Company’s previously filed Registration Statement on Form S-3, which registration statement expired in May 2020. The Company filed a new registration statement on Form S-1 covering the exercise of the outstanding Series C Warrants and Series D Warrants, which was declared effective by the SEC on May 27, 2020.

On July 6, 2020, the Company completed an underwritten public offering of 42,857,142 shares of its common stock, including the underwriter’s full exercise of an over-allotment option, at the public offering price per share of $0.35 per share, generating net proceeds of approximately $13.6 million. Following the offering, the exercise price of the outstanding Series B Warrants was adjusted to $0.35 per share and the number of shares of common stock underlying such warrants increased to 567,660 shares (see Note 9).