DISCONTINUED OPERATION (Details) - Discontinued operations - USD ($)	3 Months Ended	6 Months Ended
Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Operating expenses
Revenue	$ 0	$ 0	$ 0	$ 0
Cost of revenue	0	0	0	0
Inventory valuation reserve	0	(404,350)	0	(404,350)
Gross profit	0	(404,350)	0	(404,350)
General and administrative	0	(9,000)	0	(27,520)
Stock-based compensation	0	(28,125)	0	(46,875)
Operating loss	0	(441,475)	0	(478,745)
Income tax provision	0	0	0	0
Loss from discontinued operations, net of tax	$ 0	$ (441,475)	$ 0	$ (478,745)

Amount classified as inventory valuation reserve attributable to discontinued operations.

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Amount of stock based compensation expenses attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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Amount of costs of goods sold attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of general and administrative expense attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of gross profit attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of operating income (loss) attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

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Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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