Summary of Significant Accounting Policies - Long-Lived Assets (Details) - USD ($)	5 Months Ended	12 Months Ended
	Dec. 31, 2017	Jul. 31, 2017	Jul. 31, 2016
Property, Plant and Equipment [Line Items]
Capitalized asset purchase price (greater than)	$ 2,500
Finite-lived intangible asset, useful life	20 years
Depreciation and amortization	$ 2,142	$ 5,140	$ 2,389
Impairment of long-lived assets	$ 0	$ 0	$ 0
Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	7 years