Note 3 - Customer Deposit	3 Months Ended
Mar. 31, 2013
Deposit Liabilities Disclosures [Text Block]	Note 3. Customer Deposit On March 24, 2011, we entered into a contract in which Central Garden & Pet Company (“Central”) was granted the exclusive worldwide right and license to sell, market, offer for sale, distribute import, export, and otherwise exploit products that contain the BioLargo technologies in the “pet supplies industry” (which is defined in the agreement, and does not include products for equine or livestock). Pursuant to the Central contract, we received a $100,000 non-refundable deposit which would be credited against future orders, if any. The rights granted to Central remain exclusive so long as Central purchases a minimum amount of product at various times, as set forth in the agreement. The agreement terminates only upon uncured breach of material warranty or obligation. On February 11, 2013, we gave Central written notice of their failure to purchase the minimum required product from us to maintain exclusive rights to our technology in the “pet supplies industry” pursuant to the agreement. To maintain exclusive rights, within 60 days of our written notice Central must have either purchased the minimum amount of product or compensate us for lost profits as if they had done so.

Note 3 - Customer Deposit

3 Months Ended

Mar. 31, 2013

Deposit Liabilities Disclosures [Text Block]

Note 3. Customer Deposit

On March 24, 2011, we entered into a contract in which Central Garden & Pet Company (“Central”) was granted the exclusive worldwide right and license to sell, market, offer for sale, distribute import, export, and otherwise exploit products that contain the BioLargo technologies in the “pet supplies industry” (which is defined in the agreement, and does not include products for equine or livestock). Pursuant to the Central contract, we received a $100,000 non-refundable deposit which would be credited against future orders, if any.

The rights granted to Central remain exclusive so long as Central purchases a minimum amount of product at various times, as set forth in the agreement. The agreement terminates only upon uncured breach of material warranty or obligation.

On February 11, 2013, we gave Central written notice of their failure to purchase the minimum required product from us to maintain exclusive rights to our technology in the “pet supplies industry” pursuant to the agreement. To maintain exclusive rights, within 60 days of our written notice Central must have either purchased the minimum amount of product or compensate us for lost profits as if they had done so.

- Definition

The entire disclosure for deposit liabilities including data and tables. It may include a description of the entity's deposit liabilities, the aggregate amount of time deposits (including certificates of deposit) in denominations of $100,000 or more at the balance sheet date; the aggregate amount of any demand deposits that have been reclassified as loan balances, such as overdrafts, at the balance sheet date; deposits that are received on terms other than those in the normal course of business, the amount of accrued interest on deposit liabilities; securities, mortgage loans or other financial instruments that serve as collateral for deposits; for time deposits having a remaining term of more than one year, the aggregate amount of maturities for each of the five years following the balance sheet date; and the weighted average interest rate for all deposit liabilities held by the entity.

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