Amount of transactions with related party during the financial reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864

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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.

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Gross number of share options (or share units) granted during the period.

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Related Party Transactions - Narrative (Details) - USD ($)		9 Months Ended
	Jul. 19, 2016	Jan. 31, 2017	Jan. 31, 2016	Apr. 30, 2016
Related Party Transaction [Line Items]
Shares granted	1,568,191	2,420,681
Fair value of awards		$ 6,201,000		$ 10,000
Board of Directors Chairman [Member]
Related Party Transaction [Line Items]
Related related party transaction, amounts of transaction		$ 54,000	$ 54,000
Shares granted		45,000
Fair value of awards		$ 94,132
Substantial Stockholders [Member]
Related Party Transaction [Line Items]
Related related party transaction, amounts of transaction		$ 22,000	$ 8,800