Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Net income	$ 3,803,226	$ 4,037,110
Unrealized (loss) gain from marketable securities, net of tax	(308,499)	94,848
Comprehensive income	$ 3,494,727	$ 4,131,958