Note 2 - Going Concern and Management's Plan	12 Months Ended
Dec. 31, 2023
Notes to Financial Statements
Substantial Doubt about Going Concern [Text Block]	NOTE 2. GOING CONCERN AND MANAGEMENT’S PLAN The Company has incurred losses and generated negative cash flows from operations since its inception. As of December 31, 2023, the Company had an accumulated deficit of $333.3 million and cash and cash equivalents of $1.1 million. Our history of operating losses and negative operating cash flows from continuing operations raises substantial doubt about our ability to continue as a going concern within one year from the date of this filing. Due to these historical losses and negative cash flows, management has considered various strategic alternatives. Specifically, we recently completed a refinancing in December 2023, as further described below. On December 1, 2023, an entity owned by Cable Car Capital LLC, Funicular Funds, LP (Funicular), purchased $0.4 million of shares of common stock of the Company and lent the Company $4.1 million. Related to this financing, Funicular was also granted warrants to purchase up to 5.0 million shares of common stock of the Company. If Funicular exercised all its warrants, it would own 49.8% of the Company. The Company also exchanged existing warrants with other investors to purchase an aggregate 2.2 million shares of common stock of the Company for an aggregate of approximately 0.6 million shares of common stock of the Company and new warrants to purchase 1.2 million shares of common stock of the Company. With the proceeds of this financing, the Company repaid its $1.5 million mortgage note (see Note 9) and will use the remaining balance to fund its current and future general working capital and operating, investing, and financing cash flow needs. On January 25, 2024, the Company sold Golden Ridge for $2.15 million. As a result of the sale, the Company has streamlined its business and balance sheet, eliminating unprofitable operations. The Company also believes additional cash can be secured through other debt or structured equity financing, if necessary. However, there can be no assurance that equity or debt financing will be available to the Company should it need it or, if available, that the terms will be satisfactory to the Company and not dilutive to existing shareholders. The Company’s failure to raise capital as and when needed could have significant negative consequences for its business, financial condition, and results of consolidated operations.

Note 2 - Going Concern and Management's Plan

12 Months Ended

Dec. 31, 2023

Substantial Doubt about Going Concern [Text Block]

NOTE 2. GOING CONCERN AND MANAGEMENT’S PLAN

The Company has incurred losses and generated negative cash flows from operations since its inception. As of December 31, 2023, the Company had an accumulated deficit of $333.3 million and cash and cash equivalents of $1.1 million.

Our history of operating losses and negative operating cash flows from continuing operations raises substantial doubt about our ability to continue as a going concern within one year from the date of this filing. Due to these historical losses and negative cash flows, management has considered various strategic alternatives. Specifically, we recently completed a refinancing in December 2023, as further described below.

On December 1, 2023, an entity owned by Cable Car Capital LLC, Funicular Funds, LP (Funicular), purchased $0.4 million of shares of common stock of the Company and lent the Company $4.1 million.

Related to this financing, Funicular was also granted warrants to purchase up to 5.0 million shares of common stock of the Company. If Funicular exercised all its warrants, it would own 49.8% of the Company. The Company also exchanged existing warrants with other investors to purchase an aggregate 2.2 million shares of common stock of the Company for an aggregate of approximately 0.6 million shares of common stock of the Company and new warrants to purchase 1.2 million shares of common stock of the Company.

With the proceeds of this financing, the Company repaid its $1.5 million mortgage note (see Note 9) and will use the remaining balance to fund its current and future general working capital and operating, investing, and financing cash flow needs.

On January 25, 2024, the Company sold Golden Ridge for $2.15 million. As a result of the sale, the Company has streamlined its business and balance sheet, eliminating unprofitable operations.

The Company also believes additional cash can be secured through other debt or structured equity financing, if necessary. However, there can be no assurance that equity or debt financing will be available to the Company should it need it or, if available, that the terms will be satisfactory to the Company and not dilutive to existing shareholders. The Company’s failure to raise capital as and when needed could have significant negative consequences for its business, financial condition, and results of consolidated operations.