Accrued Liabilities (Details) $ in Thousands	9 Months Ended
Apr. 30, 2020 USD ($)
Payables and Accruals [Abstract]
Payment advance	$ 2,526

The cash outflow from advancing money to an affiliate (an entity that is related but not strictly controlled by the entity).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585

Name:	us-gaap_PaymentsForAdvanceToAffiliate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration