Stock Options (Details)	9 Months Ended
Jan. 31, 2016 USD ($) $ / shares shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of Options, Outstanding, beginning balance	540,941
Number of Options, Exercisable, beginning balance	158,241
Number of Options, Granted	564,706
Number of Options, Exercised
Number of Options, Forfeited/Cancelled	(395,629)
Number of Options, Outstanding, ending balance	710,019
Number of Options, Exercisable, ending balance	398,823
Weighted Avg. Exercise Price, Outstanding \| $ / shares	$ 2.00
Weighted Avg. Exercise Price, Granted \| $ / shares	$ 2.15
Weighted Avg. Exercise Price, Exercised \| $ / shares
Weighted Avg. Exercise Price, Forfeited/Cancelled \| $ / shares	$ 11.72
Weighted Avg. Exercise Price, Outstanding \| $ / shares	4.00
Weighted Avg. Exercise Price, Exercisable \| $ / shares	$ 3.50
Outstanding - Aggregate Intrinsic Value \| $
Exercisable - Aggregate Intrinsic Value \| $

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

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

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Number of share options (or share units) exercised during the current period.

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