000 - Document - Document And Entity Information link:calculationLink link:definitionLink link:presentationLink 001 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited) link:calculationLink link:definitionLink link:presentationLink 002 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 003 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Condensed Consolidated Statements of Stockholders' Equity (Unaudited) link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 006 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 1 - Business and Organization link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 2 - Summary of Significant Accounting Policies link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 3 - Sale of Stock for Cash link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 4 - Debt Obligations link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 5 - Share-based Compensation link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 6 - Warrants link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 7 - Accounts Payable and Accrued Expenses link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 8 - Noncontrolling Interest - Clyra Medical link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 9 - BioLargo Engineering, Science and Technologies, LLC link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 10 - BioLargo Energy Technologies, Inc. link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note 11 - Business Segment Information link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note 12 - Leases link:calculationLink link:definitionLink link:presentationLink 019 - Disclosure - Note 13 - Legal Proceedings link:calculationLink link:definitionLink link:presentationLink 020 - Disclosure - Note 14 - Subsequent Events link:calculationLink link:definitionLink link:presentationLink 995467 - Disclosure - Significant Accounting Policies (Policies) link:calculationLink link:definitionLink link:presentationLink 995468 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Tables) link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Note 4 - Debt Obligations (Tables) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Note 5 - Share-based Compensation (Tables) link:calculationLink link:definitionLink link:presentationLink 995471 - Disclosure - Note 6 - Warrants (Tables) link:calculationLink link:definitionLink link:presentationLink 995472 - Disclosure - Note 7 - Accounts Payable and Accrued Expenses (Tables) link:calculationLink link:definitionLink link:presentationLink 995473 - Disclosure - Note 8 - Noncontrolling Interest - Clyra Medical (Tables) link:calculationLink link:definitionLink link:presentationLink 995474 - Disclosure - Note 11 - Business Segment Information (Tables) link:calculationLink link:definitionLink link:presentationLink 995475 - Disclosure - Note 12 - Leases (Tables) link:calculationLink link:definitionLink link:presentationLink 995476 - Disclosure - Note 1 - Business and Organization (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995477 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995478 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Summary of Cash Balances (Details) link:calculationLink link:definitionLink link:presentationLink 995479 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Credit Concentration (Details) link:calculationLink link:definitionLink link:presentationLink 995480 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Inventory (Details) link:calculationLink link:definitionLink link:presentationLink 995481 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Other Non-current Assets (Details) link:calculationLink link:definitionLink link:presentationLink 995482 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Stock Options, Valuation Assumptions (Details) link:calculationLink link:definitionLink link:presentationLink 995483 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Schedule of Equipment and Leasehold Improvements (Details) link:calculationLink link:definitionLink link:presentationLink 995484 - Disclosure - Note 3 - Sale of Stock for Cash (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995485 - Disclosure - Note 4 - Debt Obligations (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995486 - Disclosure - Note 4 - Debt Obligations - Schedule of Debt (Details) link:calculationLink link:definitionLink link:presentationLink 995487 - Disclosure - Note 5 - Share-based Compensation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995488 - Disclosure - Note 5 - Share-based Compensation - Stock Options (Details) link:calculationLink link:definitionLink link:presentationLink 995489 - Disclosure - Note 6 - Warrants (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995490 - Disclosure - Note 6 - Warrants - Warrants Outstanding (Details) link:calculationLink link:definitionLink link:presentationLink 995491 - Disclosure - Note 6 - Warrants - Assumptions Used to Determine Fair Value of Warrants (Details) link:calculationLink link:definitionLink link:presentationLink 995492 - Disclosure - Note 7 - Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Details) link:calculationLink link:definitionLink link:presentationLink 995493 - Disclosure - Note 8 - Noncontrolling Interest - Clyra Medical (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995494 - Disclosure - Note 8 - Noncontrolling Interest - Clyra Medical - Common Shares Outstanding (Details) link:calculationLink link:definitionLink link:presentationLink 995495 - Disclosure - Note 8 - Noncontrolling Interest - Clyra Medical - Valuation Assumptions (Details) link:calculationLink link:definitionLink link:presentationLink 995496 - Disclosure - Note 8 - Noncontrolling Interest - Clyra Medical - Warrants Outstanding (Details) link:calculationLink link:definitionLink link:presentationLink 995497 - Disclosure - Note 8 - Noncontrolling Interest - Clyra Medical - Summary of Accounts Payable and Accrued Expenses (Details) link:calculationLink link:definitionLink link:presentationLink 995498 - Disclosure - Note 8 - Noncontrolling Interest - Clyra Medical - Schedule of Lease Maturity (Details) link:calculationLink link:definitionLink link:presentationLink 995499 - Disclosure - Note 9 - BioLargo Engineering, Science and Technologies, LLC (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995500 - Disclosure - Note 10 - BioLargo Energy Technologies, Inc. (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995501 - Disclosure - Note 11 - Business Segment Information (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995502 - Disclosure - Note 11 - Business Segment Information - Segment Information (Details) link:calculationLink link:definitionLink link:presentationLink 995503 - Disclosure - Note 12 - Leases (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995504 - Disclosure - Note 12 - Leases - Schedule of Future Minimum Lease Payments (Details) link:calculationLink link:definitionLink link:presentationLink 995505 - Disclosure - Note 13 - Legal Proceedings (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995506 - Disclosure - Note 14 - Subsequent Events (Details Textual) link:calculationLink link:definitionLink link:presentationLink