Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Schedule of Stock Warrant Activity (Details)

v3.19.2
Stockholders' Equity - Schedule of Stock Warrant Activity (Details) - Warrants [Member] - $ / shares
12 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Number of Warrants Outstanding, Beginning of Period 1,702,359 452,359
Number of Warrants, Granted 1,250,000
Number of Warrants, Exercised
Number of Warrants, Forfeited
Number of Warrants, Cancelled (33,415)
Number of Warrants, Recapitalization   33,415
Number of Warrants Outstanding, End of Period 1,702,359 1,702,359
Warrants exercisable at end of period 1,702,359  
Warrants expected to vest  
Weighted Average Exercise Price of Warrants Outstanding, Beginning of Period $ 3.12 $ 2.64
Weighted Average Exercise Price, Granted 3.30
Weighted Average Exercise Price, Exercised
Weighted Average Exercise Price, Forfeited
Weighted Average Exercise Price, Cancelled/Expired $ 32.61
Weighted Average Exercise Price, Recapitalization 32.61
Weighted Average Exercise Price of Warrants Outstanding, End of Period $ 3.12 $ 3.12
Weighted Average Exercise Price, exercisable at end of period 3.12  
Weighted average fair value of warrants granted during the period  
Weighted Average Remaining Contractual Life in Years, Beginning of Period 3 years 2 months 30 days 4 years 3 months 15 days
Weighted Average Remaining Contractual Life in Years, Granted   3 years 6 months
Weighted Average Remaining Contractual Life in Years, Recapitalization   9 months 7 days
Weighted Average Remaining Contractual Life in Years, End of Period 2 years 2 months 30 days 3 years 2 months 30 days