Note 1 - Business and Organization	3 Months Ended
Mar. 31, 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 five 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; and BioLargo Development Corp., organized under the laws of the State of California in 2016. Additionally, we own 82% (see Note 9) of BioLargo Engineering Science and Technologies, LLC (“BLEST”), organized under the laws of the State of Tennessee in 2017, 58% of Clyra Medical Technologies, Inc. (“Clyra” or “Clyra Medical”), organized under the laws of the State of California in 2012, and 97.1% of BioLargo Energy Technologies, Inc. (“BETI”) organized under the laws of the State of California in 2022. We consolidate the financial statements of our partially owned subsidiaries (see Note 2, subheading “Principles of Consolidation,” and Note 8). *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 three months ended March 31, 2023, we generated revenues of $3,742,000 through our subsidiaries (see Note 11), had a net loss of $494,000, used $43,000 cash in operations, and at March 31, 2023, we had working capital of $3,075,000, and current assets of $4,874,000. While our operating loss has decreased in recent quarterly periods, as has our cash used in operations, we expect to continue to need further investment capital to fund operations. We have been, and anticipate that we will continue to be, limited in terms of our capital resources. During the three months ended March 31, 2023, we (i) sold $105,000 of our common stock to Lincoln Park Capital Fund, LLC (“Lincoln Park”) (see Note 3), (ii) sold $695,000 of our common stock and warrants to accredited investors (see Notes 3 and 6), (iii) sold $225,000 of Clyra Medical Series A Preferred Stock (see Note 8), and (iv) sold $550,000 of BETI common stock (see Note 10). As of March 31, 2023, our cash and cash equivalents totaled $3,264,000. Our total liabilities included a $78,000 vehicle loan, $140,000 due in U.S. Small Business Administration (SBA) loans issued pursuant to the Paycheck Protection Program (see Note 4), $150,000 due to the SBA issued pursuant to the Economic Injury Disaster program (see Note 4), and $247,000 owed by Clyra Medical due in 2024 (see Note 8). Subsequent to March 31, 2023, we continued to sell common stock to Lincoln Park for working capital as needed (see Note 13). 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, and in the long term, our ability to attain a reasonable threshold of operating efficiencies and achieve profitable operations by licensing or otherwise commercializing products incorporating our technologies. 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

3 Months Ended

Mar. 31, 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 five 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; and BioLargo Development Corp., organized under the laws of the State of California in 2016. Additionally, we own 82% (see Note 9) of BioLargo Engineering Science and Technologies, LLC (“BLEST”), organized under the laws of the State of Tennessee in 2017, 58% of Clyra Medical Technologies, Inc. (“Clyra” or “Clyra Medical”), organized under the laws of the State of California in 2012, and 97.1% of BioLargo Energy Technologies, Inc. (“BETI”) organized under the laws of the State of California in 2022. We consolidate the financial statements of our partially owned subsidiaries (see Note 2, subheading “Principles of Consolidation,” and Note 8).

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 three months ended March 31, 2023, we generated revenues of $3,742,000 through our subsidiaries (see Note 11), had a net loss of $494,000, used $43,000 cash in operations, and at March 31, 2023, we had working capital of $3,075,000, and current assets of $4,874,000. While our operating loss has decreased in recent quarterly periods, as has our cash used in operations, we expect to continue to need further investment capital to fund operations. We have been, and anticipate that we will continue to be, limited in terms of our capital resources.

During the three months ended March 31, 2023, we (i) sold $105,000 of our common stock to Lincoln Park Capital Fund, LLC (“Lincoln Park”) (see Note 3), (ii) sold $695,000 of our common stock and warrants to accredited investors (see Notes 3 and 6), (iii) sold $225,000 of Clyra Medical Series A Preferred Stock (see Note 8), and (iv) sold $550,000 of BETI common stock (see Note 10).

As of March 31, 2023, our cash and cash equivalents totaled $3,264,000. Our total liabilities included a $78,000 vehicle loan, $140,000 due in U.S. Small Business Administration (SBA) loans issued pursuant to the Paycheck Protection Program (see Note 4), $150,000 due to the SBA issued pursuant to the Economic Injury Disaster program (see Note 4), and $247,000 owed by Clyra Medical due in 2024 (see Note 8).

Subsequent to March 31, 2023, we continued to sell common stock to Lincoln Park for working capital as needed (see Note 13).

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, and in the long term, our ability to attain a reasonable threshold of operating efficiencies and achieve profitable operations by licensing or otherwise commercializing products incorporating our technologies. The consolidated financial statements do not include any adjustments that might be necessary if we are unable to continue as a going concern.