Note 13 - Subsequent Events	6 Months Ended
Jun. 30, 2023
Notes to Financial Statements
Subsequent Events [Text Block]	*Note 13.* Subsequent Events. Management has evaluated subsequent events through the date of the filing of this quarterly report and management noted the following for disclosure. Lincoln Park Capital Purchase of Shares** From July 1, 2023, through August 10, 2023, we sold 782,553 shares of common stock to Lincoln Park pursuant to the 2022 LPC Purchase Agreement (see Note 3) and received $136,000 in gross and net proceeds. These sales were registered with the SEC on Form S-1 (file number 333-268973). *Clyra Medical* – *Sales of Series A Preferred Stock Units* From July 1, 2023, through August 10, 2023, Clyra Medical sold 81 shares of its Series A Preferred Stock, and in exchange received $25,000 in gross and net proceeds. Purchasers of the Series A Preferred Stock also received a 3-year warrant to purchase the same number of additional shares of common stock for $372 per share. (See Note 8, “Sales of Series A Preferred Stock”.) *BETI* – *Sales of Common Stock* From July 1, 2023, through August 10, 2023, BETI sold 10,000 shares of its common stock, and in exchange received $25,000 in gross and net proceeds. (See Note 10.)

Note 13 - Subsequent Events

6 Months Ended

Jun. 30, 2023

Note 13. Subsequent Events.

Management has evaluated subsequent events through the date of the filing of this quarterly report and management noted the following for disclosure.

Lincoln Park Capital Purchase of Shares

From July 1, 2023, through August 10, 2023, we sold 782,553 shares of common stock to Lincoln Park pursuant to the 2022 LPC Purchase Agreement (see Note 3) and received $136,000 in gross and net proceeds. These sales were registered with the SEC on Form S-1 (file number 333-268973).

Clyra Medical – Sales of Series A Preferred Stock Units

From July 1, 2023, through August 10, 2023, Clyra Medical sold 81 shares of its Series A Preferred Stock, and in exchange received $25,000 in gross and net proceeds. Purchasers of the Series A Preferred Stock also received a 3-year warrant to purchase the same number of additional shares of common stock for $372 per share. (See Note 8, “Sales of Series A Preferred Stock”.)

BETI – Sales of Common Stock

From July 1, 2023, through August 10, 2023, BETI sold 10,000 shares of its common stock, and in exchange received $25,000 in gross and net proceeds. (See Note 10.)