Note 2 - Summary of Significant Accounting Policies (Details) (USD $)

6 Months Ended

Jun. 30, 2013

Jun. 30, 2012

Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]

Depreciation (in Dollars)

$ 0

$ 1,646

Amortization of Intangible Assets (in Dollars)

5,460

0

Reclassification, Policy [Policy Text Block]

Reclassification of Expense

Certain expenses have been reclassified from selling, general and administrative expense into research and development expenses. Management believes that this reclassification is necessary as these expenses relate to further development of the BioLargo technology into the wound care and water treatment industries and have recently become significant.

Selling, General and Administrative Expense [Member] | 2007 Plan [Member]

Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]

Allocated Share-based Compensation Expense (in Dollars)

25,200

440,007

Selling, General and Administrative Expense [Member]

Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]

Allocated Share-based Compensation Expense (in Dollars)

$ 68,000

$ 388,812