Note 9 - Noncontrolling Interest - BioLargo Energy Technologies, Inc. (BETI) (Details Textual) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Jan. 01, 2023 |
|
| Proceeds from Issuance of Common Stock | $ 2,027,000 | $ 594,000 | |
| BioLargo Energy Technologies, Inc (BETI) [Member] | |||
| Stock Issued During Period, Shares, New Issues (in shares) | 114,865 | 20,000 | |
| Proceeds from Issuance of Common Stock | $ 425,000 | $ 50,000 | |
| Stock Conversion, Discount on Volume Weighted Average Price | 20.00% | ||
| Shares, Outstanding (in shares) | 9,605,826 | ||
| Shares, Issued (in shares) | 9,605,826 | ||
| BioLargo Energy Technologies, Inc (BETI) [Member] | |||
| Investment Owned, Balance, Shares (in shares) | 9,095,000 | 9,000,000 | |
| X | ||||||||||
- Definition Percentage discount on volume weighed average price upon conversion of stock. No definition available.
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- Definition Number of shares of investment owned. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The cash inflow from the additional capital contribution to the entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of shares issued which are neither cancelled nor held in the treasury. No definition available.
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- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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- Details
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