Equity (Details) - USD ($) $ in Thousands	3 Months Ended
Oct. 31, 2016	Jul. 31, 2016
Equity (Textual)
Treasury stock, shares	40,000	40,000
Treasury stock, value	$ 428	$ 428
Class B Common Stock [Member] \| Officers [Member]
Equity (Textual)
Stock issued during period as compensation	108,000
Class B Common Stock [Member] \| Other Employees [Member]
Equity (Textual)
Stock issued during period as compensation	56,000
Class B Common Stock [Member] \| Davidi Jonas [Member]
Equity (Textual)
Stock issued during period as compensation	120,000
Class B Common Stock [Member] \| Consultant [Member]
Equity (Textual)
Stock issued during period as compensation	1,250

The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29,30)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656

Name:	us-gaap_TreasuryStockValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant