ÌÒÖ­Ó°Ôº

Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Stock Options Narrative) (Details)

v3.10.0.1
Stockholders' Equity (Stock Options Narrative) (Details) - USD ($)
6 Months Ended
Sep. 06, 2018
Jul. 19, 2018
Oct. 31, 2018
Oct. 31, 2017
Jul. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý
Unrecognized compensation cost Ìý Ìý $ 2,440,436 Ìý Ìý
Weighted average recognition period Ìý Ìý 3 years Ìý Ìý
Stock-based compensation Ìý Ìý $ 515,291 Ìý Ìý
Share issued in exercise of stock options Ìý Ìý 26,807 Ìý Ìý
Proceeds from stock options exercised Ìý Ìý $ 60,102 $ 53,045 Ìý
Chief Executive Officer [Member] Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý
Options granted Ìý 200,000 Ìý Ìý Ìý
Options granted, exercise price Ìý $ 7.55 Ìý Ìý Ìý
Weighted average recognition period Ìý 5 years Ìý Ìý Ìý
Chief Academic Officer [Member] Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý
Options granted Ìý 180,000 Ìý Ìý Ìý
Options granted, exercise price Ìý $ 7.55 Ìý Ìý Ìý
Weighted average recognition period Ìý 5 years Ìý Ìý Ìý
Chief Operating Officer [Member] Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý
Options granted Ìý 180,000 Ìý Ìý Ìý
Options granted, exercise price Ìý $ 7.55 Ìý Ìý Ìý
Weighted average recognition period Ìý 5 years Ìý Ìý Ìý
Board of directors [Member] Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý
Options granted Ìý 560,000 Ìý Ìý Ìý
Weighted average recognition period Ìý 5 years Ìý Ìý Ìý
Fair value of stock options granted Ìý $ 1,433,600 Ìý Ìý Ìý
Fair value of stock options per share Ìý $ 2.56 Ìý Ìý Ìý
Chief Financial Officer [Member] Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý
Options granted 180,000 Ìý Ìý Ìý Ìý
Weighted average recognition period 5 years Ìý Ìý Ìý Ìý
Chief Accounting Officer [Member] Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý
Options granted 50,000 Ìý Ìý Ìý Ìý
Weighted average recognition period 5 years Ìý Ìý Ìý Ìý
Employee Stock Option [Member] Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý
Stock-based compensation Ìý Ìý $ 515,291 Ìý Ìý
Cashless Exercise of Stock Options [Member] Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý
Share issued in exercise of stock options Ìý Ìý 30,764 Ìý Ìý
Cashless exercise of stock option Ìý Ìý 45,836 Ìý Ìý
Equity Incentive Plan [Member] Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý
Equity Incentive Plan, shares authorized Ìý Ìý Ìý Ìý 3,500,000
Equity Incentive Plan, available shares remaining for issuance Ìý Ìý Ìý Ìý