v3.3.1.900
Note 14 - Concentration of Risk (Details) - Percentage of Gross Accounts Receivable - Accounts Receivable [Member] - Customer Concentration Risk [Member]
9 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2014
WDC Solar, Inc. [Member]    
Concentration Risk [Line Items]    
Percentage of accounts receivable 54.60% 40.10%
Lowe's Companies, Inc. [Member]    
Concentration Risk [Line Items]    
Percentage of accounts receivable 11.40% 16.80%
Hyundai Heavy Industries, Co., Ltd. [Member]    
Concentration Risk [Line Items]    
Percentage of accounts receivable 10.70% 0.00%