Note 1 - Business and Organization	9 Months Ended
Sep. 30, 2023
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Note 1. Business and Organization *Description of Business* BioLargo, Inc. (“BioLargo”, or the “Company”) invents, develops, and commercializes innovative platform technologies to solve challenging environmental problems like PFAS contamination (per- and polyfluoroalkyl substances), advanced water and wastewater treatment, industrial odor control, air quality control, infection control, and myriad environmental remediation challenges. Our business strategy is straightforward: we invent or acquire technologies that we believe have the potential to be disruptive in large commercial markets; we develop and validate these technologies to advance and promote their commercial success as we leverage our considerable scientific, engineering, and entrepreneurial talent; we then monetize these technical assets through a variety of business structures that may include licensure, joint venture, sale, spin off, or by deploying direct to market strategies. *Organization* We are a Delaware corporation formed in 1991. We have six wholly-owned subsidiaries: BioLargo Life Technologies, Inc., organized under the laws of the State of California in 2006; ONM Environmental, Inc., organized under the laws of the State of California in 2009; BioLargo Equipment and Technologies, Inc., organized under the laws of the State of California in 2022; BioLargo Water, Inc. (“Water”), organized under the laws of Canada in 2014; BioLargo Equipment and Solutions Technologies, Inc., organized under the laws of the State of California in 2022; and BioLargo Development Corp., organized under the laws of the State of California in 2016. Additionally, we own 53% of Clyra Medical Technologies, Inc. (“Clyra” or “Clyra Medical”), organized under the laws of the State of California in 2012 (see Note 8), 82% of BioLargo Engineering Science and Technologies, LLC (“BLEST”), organized under the laws of the State of Tennessee in 2017 (see Note 9), and 96% of BioLargo Energy Technologies, Inc. (“BETI”) organized under the laws of the State of California in 2022 (see Note 10). We consolidate the financial statements of our partially owned subsidiaries (see Note 2, subheading “Principles of Consolidation,”). *Liquidity / Going Concern* The accompanying consolidated financial statements have been prepared on a going concern basis, which contemplates the realization of assets and the settlement of liabilities and commitments in the normal course of our business. For the nine months ended September 30, 2023, we generated revenues of $7,860,000 through our business segments (see Note 11), had a net loss of $3,628,000, used $2,363,000 cash in operations, and at September 30, 2023, we had working capital of $2,951,000, and current assets of $4,691,000. During the nine months ended September 30, 2023, we sold (i) $502,000 of our common stock to Lincoln Park Capital Fund, LLC (“Lincoln Park”) (see Note 3), (ii) $995,000 of our common stock and warrants to accredited investors (see Notes 3 and 6), (iii) $1,575,000 of Clyra Medical Series A Preferred Stock (see Note 8), and (iv) $905,000 of BETI common stock (see Note 10). Subsequent to September 30, 2023, we continued selling stock to Lincoln Park (see Note 13). As of September 30, 2023, our cash and cash equivalents totaled $3,042,000. Our total liabilities included a $71,000 vehicle loan, $140,000 due in U.S. Small Business Administration (SBA) loans issued pursuant to the Paycheck Protection Program (see Note 4), $148,000 due to the SBA issued pursuant to the Economic Injury Disaster program (see Note 4), and $234,000 owed by Clyra Medical due in 2024 (see Note 8). We have been, and anticipate that we will continue to be, limited in terms of our capital resources, and expect to continue to need further investment capital to fund operations. If we are unable to rely on our current arrangement with Lincoln Park to fund our working capital requirements, we will have to rely on other forms of financing, and there is no assurance that we will be able to do so, or if we do so, it will be on favorable terms. The foregoing factors raise substantial doubt about our ability to continue as a going concern, unless we are able to continue to raise funds through stock sales to Lincoln Park or other private financings, or attain a reasonable threshold of operating efficiencies and achieve profitable operations. The consolidated financial statements do not include any adjustments that might be necessary if we are unable to continue as a going concern.

Note 1 - Business and Organization

9 Months Ended

Sep. 30, 2023

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

Note 1. Business and Organization

Description of Business

BioLargo, Inc. (“BioLargo”, or the “Company”) invents, develops, and commercializes innovative platform technologies to solve challenging environmental problems like PFAS contamination (per- and polyfluoroalkyl substances), advanced water and wastewater treatment, industrial odor control, air quality control, infection control, and myriad environmental remediation challenges. Our business strategy is straightforward: we invent or acquire technologies that we believe have the potential to be disruptive in large commercial markets; we develop and validate these technologies to advance and promote their commercial success as we leverage our considerable scientific, engineering, and entrepreneurial talent; we then monetize these technical assets through a variety of business structures that may include licensure, joint venture, sale, spin off, or by deploying direct to market strategies.

Organization

We are a Delaware corporation formed in 1991. We have six wholly-owned subsidiaries: BioLargo Life Technologies, Inc., organized under the laws of the State of California in 2006; ONM Environmental, Inc., organized under the laws of the State of California in 2009; BioLargo Equipment and Technologies, Inc., organized under the laws of the State of California in 2022; BioLargo Water, Inc. (“Water”), organized under the laws of Canada in 2014; BioLargo Equipment and Solutions Technologies, Inc., organized under the laws of the State of California in 2022; and BioLargo Development Corp., organized under the laws of the State of California in 2016. Additionally, we own 53% of Clyra Medical Technologies, Inc. (“Clyra” or “Clyra Medical”), organized under the laws of the State of California in 2012 (see Note 8), 82% of BioLargo Engineering Science and Technologies, LLC (“BLEST”), organized under the laws of the State of Tennessee in 2017 (see Note 9), and 96% of BioLargo Energy Technologies, Inc. (“BETI”) organized under the laws of the State of California in 2022 (see Note 10). We consolidate the financial statements of our partially owned subsidiaries (see Note 2, subheading “Principles of Consolidation,”).

Liquidity / Going Concern

The accompanying consolidated financial statements have been prepared on a going concern basis, which contemplates the realization of assets and the settlement of liabilities and commitments in the normal course of our business. For the nine months ended September 30, 2023, we generated revenues of $7,860,000 through our business segments (see Note 11), had a net loss of $3,628,000, used $2,363,000 cash in operations, and at September 30, 2023, we had working capital of $2,951,000, and current assets of $4,691,000.

During the nine months ended September 30, 2023, we sold (i) $502,000 of our common stock to Lincoln Park Capital Fund, LLC (“Lincoln Park”) (see Note 3), (ii) $995,000 of our common stock and warrants to accredited investors (see Notes 3 and 6), (iii) $1,575,000 of Clyra Medical Series A Preferred Stock (see Note 8), and (iv) $905,000 of BETI common stock (see Note 10). Subsequent to September 30, 2023, we continued selling stock to Lincoln Park (see Note 13). As of September 30, 2023, our cash and cash equivalents totaled $3,042,000. Our total liabilities included a $71,000 vehicle loan, $140,000 due in U.S. Small Business Administration (SBA) loans issued pursuant to the Paycheck Protection Program (see Note 4), $148,000 due to the SBA issued pursuant to the Economic Injury Disaster program (see Note 4), and $234,000 owed by Clyra Medical due in 2024 (see Note 8). We have been, and anticipate that we will continue to be, limited in terms of our capital resources, and expect to continue to need further investment capital to fund operations.

If we are unable to rely on our current arrangement with Lincoln Park to fund our working capital requirements, we will have to rely on other forms of financing, and there is no assurance that we will be able to do so, or if we do so, it will be on favorable terms.

The foregoing factors raise substantial doubt about our ability to continue as a going concern, unless we are able to continue to raise funds through stock sales to Lincoln Park or other private financings, or attain a reasonable threshold of operating efficiencies and achieve profitable operations. The consolidated financial statements do not include any adjustments that might be necessary if we are unable to continue as a going concern.