Cash and cash equivalents (Tables)

9 Months Ended

Sep. 30, 2014

Cash and Cash Equivalents [Abstract]

Schedule of Cash and Cash Equivalents

	SEPTEMBER 30, 2014		DECEMBER 31, 2013
Cash	$	4,292,928	$	7,292,116
Cash equivalents		11,576,306		3,714,276
	$	15,869,234	$	11,006,392