Stockholders' Equity - Warrants, Additional Information (Details) - USD ($)		3 Months Ended
Sep. 05, 2017	Oct. 31, 2017
Warrant
Class of Warrant or Right [Line Items]
Warrants issued		$ 0
Chief Financial Officer
Class of Warrant or Right [Line Items]
Warrants forfeited (in shares)	55,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Balance Type:	na
Period Type:	duration