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Note 11 - Significant Customers/Concentration (Details) - Net sales by geographical region (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Note 11 - Significant Customers/Concentration (Details) - Net sales by geographical region [Line Items]        
Net sales $ 2,949,605 $ 3,115,471 $ 9,154,674 $ 13,410,527
US and Canada [Member]
        
Note 11 - Significant Customers/Concentration (Details) - Net sales by geographical region [Line Items]        
Net sales 736,958 1,164,634 2,264,368 4,629,240
Australia [Member]
        
Note 11 - Significant Customers/Concentration (Details) - Net sales by geographical region [Line Items]        
Net sales 55,093 95,186 223,483 144,100
South America [Member]
        
Note 11 - Significant Customers/Concentration (Details) - Net sales by geographical region [Line Items]        
Net sales 4,679 31,214 30,058 290,191
Asia [Member]
        
Note 11 - Significant Customers/Concentration (Details) - Net sales by geographical region [Line Items]        
Net sales 493,542 328,325 1,645,025 1,148,140
Europe [Member]
        
Note 11 - Significant Customers/Concentration (Details) - Net sales by geographical region [Line Items]        
Net sales $ 1,659,333 $ 1,496,112 $ 4,991,740 $ 7,198,856