Note 7 - Stockholders' Equity

6 Months Ended

Jun. 30, 2022

Notes to Financial Statements

Share-Based Payment Arrangement [Text Block]

7. Stockholders’ Equity

Common Stock

On February 3, 2022, the Company entered into Amendment No. 2 to the At the Market Offering Agreement (the “Offering Agreement”) with H.C. Wainwright & Co., LLC to further increase the maximum aggregate offering price of shares of Common Stock that may be offered and sold from time to time under the Offering Agreement from $15,280,000 to $19,555,000, which enables the Company to sell an additional $4,275,000 of shares after taking into account prior sales under the Offering Agreement (the “Additional Shares”). After filing the Company’s 2021 Form 10-K in March 2022, the total offering price was updated to $18,573,000 based on the shares currently available on Company’s existing Form S-3. The terms and conditions of the Offering Agreement otherwise remain unchanged. For the six months ended June 30, 2022, the Company sold a total of 5,315,422 shares of common stock under the Offering Agreement for aggregate gross proceeds of $2,255,000 at an average selling price of $0.42 per share, resulting in net proceeds of approximately $2,044,000 after deducting commissions and other transaction costs of approximately $211,000.

Equity Plans

On January 13, 2022, the Company’s stockholders approved an amendment of the Company’s Amended 2016 Equity Incentive Plan to increase the aggregate number of shares of the Company’s common stock that may be issued under the plan from 392,500 shares to 1,200,000 shares.

Net Loss Per Share

Net loss per share is computed by dividing the net loss by the weighted average number of common shares outstanding. The calculation of the basic and diluted earnings per share is the same for all periods presented, as the effect of the potential common stock equivalents noted below is anti-dilutive due to the Company’s net loss position for all periods presented. Anti-dilutive securities consisted of the following at June 30:

	2022		2021
Common stock equivalents of convertible promissory note and accrued interest		29,235,002		6,758,897
Warrants – other		653,248		653,248
Stock options		293,670		386,461
Total		30,181,920		7,798,606