Long-term debt (Details Textual) (USD $)	12 Months Ended		0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Jul. 06, 2011 REFCO [Member]
Long Term Debt (Textual)
Term loan	$ 1,513,000		$ 2,430,000
Interest rate			3.54%
Term loan maturity date			Jul. 06, 2017
Aggregate capital lease	$ 19,532	$ 37,552
Maturity period for capital lease	Through 2015
Interest rates minimum	7.00%
Interest rates maximum	14.00%