v3.3.1.900
Note 18 - Concentration of Risk in Customer and Supplier Relationships (Details) - Percentages of Sales to Largest Customers - Sales Revenue, Goods, Net [Member] - Customer Concentration Risk [Member]
9 Months Ended 12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Smart Energy Today [Member]        
Concentration Risk [Line Items]        
Percentage of sales 30.40% 13.50% 13.30% 13.50%
WDC Solar, Inc. [Member]        
Concentration Risk [Line Items]        
Percentage of sales 0.00% 14.70% 12.00% 14.70%
JCF Wholesale [Member]        
Concentration Risk [Line Items]        
Percentage of sales 0.00% 10.60% 8.70% 10.60%
Lowe's Companies, Inc. [Member]        
Concentration Risk [Line Items]        
Percentage of sales     5.90% 6.90%
Sustainable Environmental Enterprises [Member]        
Concentration Risk [Line Items]        
Percentage of sales     1.30% 52.80%