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Note 8 - Noncontrolling Interest - Clyra Medical (Tables)
9 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Other Ownership Interests [Table Text Block]
Shareholder
 
Shares
   
Percent
 
BioLargo, Inc.
   
26,053
     
38.0%
 
Sanatio Capital
(1)
   
11,520
     
16.8%
 
Scion Solutions
(2)
   
15,500
     
22.6%
 
Other
   
15,572
     
22.6%
 
Total
 
 
68,645