Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income	$ 3,310,795	$ 3,875,622	$ 7,114,021	$ 7,912,732
Unrealized loss from marketable securities, net of tax	(35,369)	(404,731)	(343,868)	(309,883)
Comprehensive income	$ 3,275,426	$ 3,470,891	$ 6,770,153	$ 7,602,849