Goodwill (Details) - USD ($)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Balance at beginning of year
Goodwill	$ 7,114,094	$ 6,146,851
Accumulated goodwill impairment losses	(79,631)	(79,631)
Goodwill acquired during the year	0	967,243
Impairment losses	0	0
Balance at end of year
Goodwill	7,114,094	7,114,094
Accumulated goodwill impairment losses	(79,631)	(79,631)
Goodwill, net	$ 7,034,463	$ 7,034,463	$ 6,067,220