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Note 18 - Concentration of Risk in Customer and Supplier Relationships (Tables)
 9 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Sales Revenue, Goods, Net [Member]    
Note 18 - Concentration of Risk in Customer and Supplier Relationships (Tables) [Line Items]    
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   

Nine Months Ended

September 30,

  
   

2015

    

2014

  

Smart Energy Today

     30.4 %     13.5 %

Rectify LLC

     10.8 %     —  

Saddleback Cellars

     —       —  

WDC Solar, Inc.

     —       14.7 %

JCF Wholesale

     —       10.6 %
 
Accounts Receivable [Member]    
Note 18 - Concentration of Risk in Customer and Supplier Relationships (Tables) [Line Items]    
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   

September 30,

2015

    

December 31,

2014

  

WDC Solar, Inc.

     54.6 %     40.1 %

Lowe’s Retail

     11.4 %     16.8 %

Hyundai Heavy Industries, Co., Ltd

     10.7 %     —  
 
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member]    
Note 18 - Concentration of Risk in Customer and Supplier Relationships (Tables) [Line Items]    
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]  
   

Years Ended

December 31,

  
   

2014

    

2013

  

Smart Energy Today

     13.3 %     13.5 %

WDC Solar, Inc.

     12.0 %     14.7 %

JCF Wholesale

     8.7 %     10.6 %

Lowe’s

     5.9 %     6.9 %

Sustainable Environmental Enterprises

     1.3 %     52.8 %
Customer Concentration Risk [Member] | Accounts Receivable [Member]    
Note 18 - Concentration of Risk in Customer and Supplier Relationships (Tables) [Line Items]    
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]  
   

December 31,

  
   

2014

    

2013

  

WDC Solar, Inc.

     40.1 %     —  

Lowe’s

     16.8 %     —  

Sustainable Environmental Enterprises

     — %     86.7 %
Smart Energy Today     6.5 %     —