Acquisitions - Change in fair value of purchase consideration (Details) - USD ($)	9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Change in fair value of purchase consideration	$ 119,630	$ 15,147,591
Pantheon [Member]
Change in fair value of purchase consideration	64,159	0
Medisource
Change in fair value of purchase consideration	55,471	0
Warrants to be issued
Change in fair value of purchase consideration	0	15,930,072
Call Option
Change in fair value of purchase consideration	$ 0	$ (782,481)