Annual report pursuant to section 13 and 15(d)

Commitments and Contingencies (Details Textual)

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Commitments and Contingencies (Details Textual) (USD $)
0 Months Ended 12 Months Ended 0 Months Ended
Dec. 01, 2013
Mar. 01, 2013
Apr. 01, 2012
Dec. 31, 2013
ChargingStation
Dec. 31, 2012
Jan. 16, 2014
Subsequent Event [Member]
Commitments (Textual)            
Term of future office lease 5 years 39 months 3 years     1 year
Monthly lease payments $ 10,300 $ 12,000 $ 2,500     $ 4,000
Lease commencing date Dec. 01, 2013 Mar. 01, 2013 Apr. 01, 2012     Jan. 16, 2014
Lease expiration date Nov. 30, 2018 May 31, 2015 Apr. 30, 2015     Jan. 31, 2015
Total rent expenses 621,000 468,000 92,000 222,695 82,584 48,000
Company commitment to purchase number of charging stations       500    
Number of units purchased under master agreement       90    
Amount paid to purchase charging stations per unit, minimum       2,500    
Amount paid to purchase charging stations per unit, maximum       2,700    
Reimbursement of price discount       $ 42,000