Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended						9 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020
Net income	$ 3,465,407	$ 3,646,507	$ 3,579,566	$ 3,925,709	$ 2,222,340	$ 2,411,865	$ 10,691,481	$ 8,559,914
Unrealized loss from marketable securities, net of tax	(380,161)	$ (197,034)	$ (90,165)	(145,452)	$ (130,324)	$ 1,242,662	(667,361)	966,886
Comprehensive income	$ 3,085,246			$ 3,780,257			$ 10,024,120	$ 9,526,800