Goodwill (Details) - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Balance at beginning of year:
Goodwill	$ 7,450,422	$ 7,114,094
Accumulated goodwill impairment losses	(79,631)	(79,631)
Goodwill, net	7,370,791	7,370,791	$ 7,034,463
Goodwill acquired during the year	0	336,328
Impairment losses	0	0
Balance at end of year:
Goodwill	7,450,422	7,450,422
Accumulated goodwill impairment losses	(79,631)	(79,631)
Goodwill, net	$ 7,370,791	$ 7,370,791	$ 7,034,463