Derivative Liabilities (Details Narrative) - USD ($)			3 Months Ended		9 Months Ended		12 Months Ended
	Nov. 23, 2015	Oct. 23, 2015	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016	Jul. 31, 2016	Apr. 30, 2012
Derivative liabilities			$ 1,641,000		$ 1,641,000		$ 1,802,000
Proceeds from private placement
Warrants liabilities			1,494,000		1,494,000
Change in fair value of warrant liability			$ 147,000	$ 1,506,000	$ 153,000	$ 6,241,000
Bridge Loan [Member]
Warrants outstanding			9,709		9,709
Number of warrants exercise during the period			5,335		5,335
Issuance of share of common stock					4,179
Remaining Warrants to be issued			4,374		4,374
2015 Private Placement Financing [Member]
Number of warrants issued			20,376,219		20,376,219
2015 Private Placement Financing [Member] | Six-Month Warrant [Member]
Warrants to purchase of common stock shares	2,820,670
Number of warrants issued							2,820,670
2015 Private Placement Financing [Member] | October Closing Date [Member] | Five Years [Member]
Warrants to purchase of common stock shares		6,666,666
Warrant term		5 years
2015 Private Placement Financing [Member] | October Closing Date [Member] | Six Months [Member]
Warrants to purchase of common stock shares		8,666,666
Warrant term		6 months
2015 Private Placement Financing [Member] | November Closing Date [Member]
Number of warrants issued								132,420
Warrants liabilities			$ 1,641,000		$ 1,641,000
Warrants outstanding			2,222,217		2,222,217
Stock price			$ 0.99		$ 0.99
Warrant expiration warrant exercise price			$ 0.45		$ 0.45
Fair value assumption of historical stock price volatility					80.00%
Fair value assumption of risk free interest rate					1.50%
Fair value assumption of warrant expiration term					3 years 7 months 6 days
2015 Private Placement Financing [Member] | November Closing Date [Member] | Five Years [Member]
Warrants to purchase of common stock shares	2,222,217
Warrant term	5 years
2015 Private Placement Financing [Member] | November Closing Date [Member] | Six Months [Member]
Warrant term	6 months
Private Placement Financing [Member] | Five Years [Member]
Warrant term							5 years
Private Placement Financing [Member] | Six Months [Member]
Warrant term							6 months
Private Placement Financing [Member] | October Closing Date [Member]
Derivative liabilities			$ 7,008,000		$ 7,008,000
Proceeds from private placement					6,000,000
Other expenses					1,008,000
Private Placement Financing [Member] | November Closing Date [Member]
Proceeds from private placement					2,000,000
Other expenses					$ 859,000