Leases (Details Textual) $ in Thousands	3 Months Ended
Oct. 31, 2019 USD ($)
Accounting Standards Update 2016-02 [Member]
Leases (Textual)
ASU 2016-02 Adoption	$ 12,400

Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

No definition available.

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