Stockholders' Equity (Details Narrative) - USD ($)	3 Months Ended
	Jul. 31, 2016	Apr. 30, 2016
Stockholders' Equity
Restricted stock issued, shares	188,333
Stock based compensation expense	$ 429,000
Warrant
Stockholders' Equity
Stock warrants outstanding	133,667
Warrant | Minimum
Stockholders' Equity
Exercise price of warrants	$ 7.50
Warrant | Maximum
Stockholders' Equity
Exercise price of warrants	$ 10.50
Series B Preferred Shares
Stockholders' Equity
Preferred stock, shares converted	279,887
Common stock issued upon conversion of preferred stock	1,865,913
Adjustment to additional paid in capital upon redemption of preferred stock	$ 3,414,621
Conversion price, per share	$ 12.20
Number of common shares potentially issuable upon conversion of Series B Preferred Stock	Convertible into 344,480 shares of common stock
Series B Preferred Stock, outstanding after giving effect to the exchange	51,672	331,559