Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Net income	$ 3,571,602	$ 3,483,744	$ 10,030,252	$ 9,921,486
Unrealized loss from marketable securities, net of tax	(295,458)	(571,862)	(227,693)	(587,068)
Comprehensive income	$ 3,276,144	$ 2,911,882	$ 9,802,559	$ 9,334,418