Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Comprehensive Income [Abstract]
Net income	$ 2,777,174	$ 2,899,342	$ 8,573,650	$ 8,719,883
Unrealized loss from marketable securities, net of tax	(151,829)	(22,474)	(762,475)	509,553
Comprehensive income	$ 2,625,345	$ 2,876,868	$ 7,811,175	$ 9,229,436