Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income	$ 3,305,197	$ 3,310,795	$ 6,437,742	$ 7,114,021
Unrealized loss from marketable securities, net of tax	(240,809)	(35,369)	(15,206)	(343,868)
Comprehensive income	$ 3,064,388	$ 3,275,426	$ 6,422,536	$ 6,770,153