Restatement of previously issued condensed interim consolidated financial statements - Statements of operations (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2019	Jan. 31, 2018	Jul. 31, 2018
Revenue
Revenue, net	$ 3,442,265		$ 5,161,413	$ 2,218
Total Revenue	3,442,265	700,000	5,161,413	702,218
Cost of Goods Sold	2,011,679		2,882,300
Gross Profit	1,430,586	700,000	2,279,113	702,218
Operating expenses
Research and development	810,938	150,897	991,005	388,679
General and administrative	6,498,664	714,689	8,771,305	1,116,050
Total Operating Expenses	7,309,602	865,586	9,762,310	1,504,729
Operating Loss	(5,879,016)	(165,586)	(7,483,197)	(802,511)
Other Income (Expense):
Interest expense	(2,097,220)	(142,245)	(2,262,936)	(277,190)
Interest income			768
Changes in fair value of contingent purchase consideration	(4,397,507)	(9,521,747)	15,147,591	18,776,629
Change in fair value of derivative liability			142,725
Impairment of long-lived assets			(99,519)
Other income, net	(51,322)		(47,436)
Net Income (Loss)	(12,524,584)	(9,829,578)	5,397,996	17,696,928	$ 35,948,698
Net (loss) attributable to noncontrolling interests	(272,147)	(92,934)	(360,403)	(209,467)
Net (Loss) Income Available to Common Stockholders	$ (12,252,437)	$ (9,736,644)	$ 5,758,399	$ 17,906,395
Basic	$ (.25)	$ (.43)	$ 0.16	$ 16.76
Diluted	$ (.25)	$ (.43)	$ 0.14	$ 6.90
Basic	49,967,615	22,430,121	36,387,206	22,430,121
Diluted	49,967,615	22,430,121	41,514,678	54,515,450
Comprehensive Income (Loss):
Net Income	$ (12,252,437)	$ (9,736,644)	$ 5,758,399	$ 17,906,395
Change in foreign currency translation adjustments		(15,730)	2,024	(3,898)
Comprehensive Income Available to Common Stockholders	$ (12,252,437)	$ (9,752,374)	5,760,423	$ 17,902,497
Adjusted [Member]
Revenue
Revenue, net			(1,406,529)
Total Revenue			(1,406,529)
Cost of Goods Sold
Gross Profit			(1,406,529)
Operating expenses
Research and development
General and administrative			(1,096,805)
Total Operating Expenses			(1,096,805)
Operating Loss			(309,724)
Other Income (Expense):
Interest expense
Interest income
Changes in fair value of contingent purchase consideration
Change in fair value of derivative liability
Impairment of long-lived assets			142,620
Other income, net
Net Income (Loss)			(167,104)
Net (loss) attributable to noncontrolling interests
Net (Loss) Income Available to Common Stockholders			$ (167,104)
Basic			$ (0.00)
Diluted			$ (0.02)
Basic
Diluted
Comprehensive Income (Loss):
Net Income			$ (167,104)
Change in foreign currency translation adjustments
Comprehensive Income Available to Common Stockholders			(167,104)
As Previously Reported [Member]
Revenue
Revenue, net			6,567,942
Total Revenue			6,567,942
Cost of Goods Sold			2,882,300
Gross Profit			3,685,642
Operating expenses
Research and development			991,005
General and administrative			9,868,110
Total Operating Expenses			10,859,115
Operating Loss			(7,173,473)
Other Income (Expense):
Interest expense			(2,262,936)
Interest income			768
Changes in fair value of contingent purchase consideration			15,147,591
Change in fair value of derivative liability			142,725
Impairment of long-lived assets			(242,139)
Other income, net			(47,436)
Net Income (Loss)			5,565,100
Net (loss) attributable to noncontrolling interests			(360,403)
Net (Loss) Income Available to Common Stockholders			$ 5,925,503
Basic			$ 0.16
Diluted			$ 0.16
Basic			36,387,206
Diluted			36,387,206
Comprehensive Income (Loss):
Net Income			$ 5,925,503
Change in foreign currency translation adjustments			2,024
Comprehensive Income Available to Common Stockholders			$ 5,927,527