Annual report pursuant to Section 13 and 15(d)

Deferred Revenue - Summary of Deferred Revenue (Details)

v3.5.0.2
Deferred Revenue - Summary of Deferred Revenue (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Deferred Revenue Arrangement [Line Items]    
Total deferred revenue $ 1,033,303 $ 1,235,332
Deferred revenue, non-current portion (109,180) (275,370)
Current portion of deferred revenue 924,123 959,962
Other [Member]    
Deferred Revenue Arrangement [Line Items]    
Total deferred revenue 132,563 36,331
Nissan [Member]    
Deferred Revenue Arrangement [Line Items]    
Total deferred revenue 144,072 681,758
NYSERDA [Member]    
Deferred Revenue Arrangement [Line Items]    
Total deferred revenue 90,021 279,477
CEC [Member]    
Deferred Revenue Arrangement [Line Items]    
Total deferred revenue 84,274 205,140
NV Energy Commission [Member]    
Deferred Revenue Arrangement [Line Items]    
Total deferred revenue 17,626 32,626
PA Turnpike [Member]    
Deferred Revenue Arrangement [Line Items]    
Total deferred revenue 64,747
Green Commuter [Member]    
Deferred Revenue Arrangement [Line Items]    
Total deferred revenue $ 500,000