Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Summary of Warrant Activity (Details)

v3.20.4
Stockholders' Equity - Summary of Warrant Activity (Details) - Warrant - USD ($)
 9 Months Ended
Oct. 31, 2020
Apr. 30, 2020
Jan. 31, 2021
Number of Shares      
Balance Outstanding, April 30, 2020 (in shares)     566,223
Granted (in shares)     0
Warrants exercised (in shares)     (192,049)
Surrendered (in shares)     0
Expired (in shares)     0
Balance Outstanding, January 31, 2020 (in shares)   566,223 374,174
Exercisable, January 31, 2020 (in shares)     374,174
Weighted Average Exercise Price      
Balance Outstanding, April 30, 2020 (in dollars per share)     $ 6.22
Granted (in dollars per share)     0
Exercised (in dollars per share)     5.60
Surrendered (in dollars per share)     0
Expired (in dollars per share)     0
Balance Outstanding, January 31, 2020 (in dollars per share)   $ 6.22 6.37
Exercisable, January 31, 2020 (in dollars per share)     $ 6.37
Weighted Average Remaining Contractual Term      
Weighted Average Remaining Contractual Term 2 years 1 month 20 days 3 years 2 months 1 day  
Weighted Average Remaining Contractual Term, Exercisable 2 years 1 month 20 days    
Aggregate Intrinsic Value      
Average Intrinsic Value   $ 950,100 $ 1,151,369
Aggregate Intrinsic Value, Exercisable     $ 1,151,369