Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Narrative (Details)

v3.7.0.1
Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Accounting Policies [Abstract]    
Allowance for doubtful accounts $ 85,375 $ 15,145
Reserve for excess and obsolete inventory 59,969 4,274
Finite-Lived Intangible Assets [Line Items]    
Impairment in the value of long-lived assets $ 164,529 199,546
Product Information [Line Items]    
Limited warranty products (in years) 10 years  
Warranty accrual adjustment $ 116,448 $ 0
Potentially dilutive shares outstanding (in shares) 3,006,357 2,846,325
Balances are insured by the FDIC (up to) $ 250,000  
Customer Concentration Risk | Revenue | Two Customers    
Product Information [Line Items]    
Concentration of credit risk (percent) 44.00%  
Customer Concentration Risk | Revenue | Four Customers    
Product Information [Line Items]    
Concentration of credit risk (percent)   66.00%
Customer Concentration Risk | Trade Receivables | Two Customers    
Product Information [Line Items]    
Concentration of credit risk (percent) 78.00%  
Customer Concentration Risk | Trade Receivables | Three Customers    
Product Information [Line Items]    
Concentration of credit risk (percent)   66.00%
PV storage    
Product Information [Line Items]    
Limited warranty products (in years) 5 years  
Patents    
Finite-Lived Intangible Assets [Line Items]    
Asset amortization, legal life (in years) 20 years