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Note 7 - Stockholders' Equity and Common Stock Warrants

3 Months Ended

Mar. 31, 2023

Notes to Financial Statements

Equity [Text Block]

7. Stockholders' Equity and Common Stock Warrants

Common Stock Warrants

As of March 31, 2023, the Company had the following warrants outstanding to acquire shares of its common stock:

		Outstanding				Range of exercise price per share				Expiration dates
Common stock warrants issued related to the May 2019 common stock offering			27,648			$250.09	-	$306.04		May and December 2024
Common stock warrants issued related to the November 2019 common stock offering			4,269				$17.51			May 2024
Common stock warrants issued related to the December 2019 common stock offering			6,264			$21.68	-	$34.92		December 2024 and June 2025
Common stock warrants issued related to the May 2020 common stock offering			11,424				$65.65			March 2025
Common stock warrants issued related to the May 2020 investor warrant exercise			4,998				$29.7			November 2025
Common stock warrants issued related to the February 2021 common stock offering			33,649				$64.08			February 2026
			88,252

During the three months ended March 31, 2023, 23,639 warrants expired.

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The entire disclosure for equity.

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