Note 12 - Related Party Transactions	12 Months Ended
Dec. 31, 2022
Related Party Transactions [Abstract]
Related Party Transactions	12. Related Party Transactions Yuma Regional Medical Center Yuma Regional Medical Center ("Yuma") is an equity investor in the Company and is considered a related party. As October 16, 2020, the Company entered into an unsecured promissory note for a principal sum of $500,000 with Yuma. This unsecured promissory note was amended in May 2021 to extend its maturity date to November 2021. As consideration for the amendment, the Company issued warrants to the noteholder to purchase an aggregate of 100 shares of the Company's common stock. The full principal amount of the unsecured promissory note and interest accrued was repaid by the Company in November 2021. On August 19, 2021, the Company issued to Yuma a warrant to purchase up to 7,549 shares of the Company's common stock at a price of $172.50 per share, subject to certain adjustments (the "August 2021 Warrants"), all of which are outstanding as of December 31, 2022. The August 2021 Warrants, which have been registered for resale, are immediately exercisable and have an expiration date of August 26, 2026. Director stipends Unpaid cash stipends owed to the Company's directors for their annual service on the Board are recorded on the Company’s consolidated balance sheets within accrued liabilities. These liabilities were $141,250 and $110,000 as of December 31, 2022, and December 31, 2021, respectively. Separation agreement with former Chief Executive Officer On October 11, 2022, the Company entered into a separation agreement with its former Chief Executive Officer whereby the parties agreed to a mutual release of claims. Subsequent to paying an aggregate of $22,000 pursuant to the terms of the separation agreement, the Company determined that it is not probable that any additional compensation would be due to the former Chief Executive Officer and therefore, the Company has not recognized any accrual related to compensation or benefits owed pursuant to the separation agreement as of December 31, 2022.

Note 12 - Related Party Transactions

12 Months Ended

Dec. 31, 2022

12. Related Party Transactions

Yuma Regional Medical Center

Yuma Regional Medical Center ("Yuma") is an equity investor in the Company and is considered a related party. As October 16, 2020, the Company entered into an unsecured promissory note for a principal sum of $500,000 with Yuma. This unsecured promissory note was amended in May 2021 to extend its maturity date to November 2021. As consideration for the amendment, the Company issued warrants to the noteholder to purchase an aggregate of 100 shares of the Company's common stock. The full principal amount of the unsecured promissory note and interest accrued was repaid by the Company in November 2021. On August 19, 2021, the Company issued to Yuma a warrant to purchase up to 7,549 shares of the Company's common stock at a price of $172.50 per share, subject to certain adjustments (the "August 2021 Warrants"), all of which are outstanding as of December 31, 2022. The August 2021 Warrants, which have been registered for resale, are immediately exercisable and have an expiration date of August 26, 2026.

Director stipends

Unpaid cash stipends owed to the Company's directors for their annual service on the Board are recorded on the Company’s consolidated balance sheets within accrued liabilities. These liabilities were $141,250 and $110,000 as of December 31, 2022, and December 31, 2021, respectively.

Separation agreement with former Chief Executive Officer

On October 11, 2022, the Company entered into a separation agreement with its former Chief Executive Officer whereby the parties agreed to a mutual release of claims. Subsequent to paying an aggregate of $22,000 pursuant to the terms of the separation agreement, the Company determined that it is not probable that any additional compensation would be due to the former Chief Executive Officer and therefore, the Company has not recognized any accrual related to compensation or benefits owed pursuant to the separation agreement as of December 31, 2022.