Interest on the line of credit (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest on the line of credit Details
Interest on the line of credit for the three and six months ended	$ 982	$ 948	$ 2,132	$ 1,885