Quarterly report pursuant to Section 13 or 15(d)

STOCK OPTIONS AND WARRANTS (Details - Warrants by exercise price)

v3.21.2
STOCK OPTIONS AND WARRANTS (Details - Warrants by exercise price)
3 Months Ended
Jul. 31, 2021
$ / shares
shares
$97.50 [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Number of Warrants exercisable 513
Weighted Average Remaining Contractual Life (Years) 4 months 20 days
$86.25 [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Number of Warrants exercisable 580
Weighted Average Remaining Contractual Life (Years) 8 months 4 days
$37.50 [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Number of Warrants exercisable 1,333
Weighted Average Remaining Contractual Life (Years) 11 months 26 days
$45.00 [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Number of Warrants exercisable 555
Weighted Average Remaining Contractual Life (Years) 9 months 21 days
Warrant [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Number of Warrants exercisable 2,981
Weighted Average Remaining Contractual Life (Years) 9 months 14 days
Weighted average exercise price exercisable | $ / shares $ 58.70