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Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Schedule of All Options and Exercisable Options (Details)

v3.21.2
Stockholders' Equity - Schedule of All Options and Exercisable Options (Details) - $ / shares
12 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý
ALL OPTIONS, Outstanding No. of Options 1,214,473 Ìý
EXERCISABLE OPTIONS, Exercisable No. of Options 1,032,411 2,734,899
$2.28 to $2.76 Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý
ALL OPTIONS, Exercise Price Lower Range $ 2.28 Ìý
ALL OPTIONS, Exercise Price Upper Range 2.76 Ìý
ALL OPTIONS, Weighted Average Exercise Price $ 2.76 Ìý
ALL OPTIONS, Outstanding No. of Options 10,423 Ìý
EXERCISABLE OPTIONS, Weighted Average Exercise Price $ 2.76 Ìý
EXERCISABLE OPTIONS, Weighted Average Remaining Life In Years 5 months 1 day Ìý
EXERCISABLE OPTIONS, Exercisable No. of Options 10,423 Ìý
$3.24 to $4.38 Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý
ALL OPTIONS, Exercise Price Lower Range $ 3.24 Ìý
ALL OPTIONS, Exercise Price Upper Range 4.38 Ìý
ALL OPTIONS, Weighted Average Exercise Price $ 3.82 Ìý
ALL OPTIONS, Outstanding No. of Options 184,222 Ìý
EXERCISABLE OPTIONS, Weighted Average Exercise Price $ 3.75 Ìý
EXERCISABLE OPTIONS, Weighted Average Remaining Life In Years 1 year 25 days Ìý
EXERCISABLE OPTIONS, Exercisable No. of Options 144,387 Ìý
$4.50 to $5.20 Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý
ALL OPTIONS, Exercise Price Lower Range $ 4.50 Ìý
ALL OPTIONS, Exercise Price Upper Range 5.20 Ìý
ALL OPTIONS, Weighted Average Exercise Price $ 4.94 Ìý
ALL OPTIONS, Outstanding No. of Options 360,654 Ìý
EXERCISABLE OPTIONS, Weighted Average Exercise Price $ 4.93 Ìý
EXERCISABLE OPTIONS, Weighted Average Remaining Life In Years 1 year 7 months 28 days Ìý
EXERCISABLE OPTIONS, Exercisable No. of Options 316,427 Ìý
$5.95 to $6.28 Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý
ALL OPTIONS, Exercise Price Lower Range $ 5.95 Ìý
ALL OPTIONS, Exercise Price Upper Range 6.28 Ìý
ALL OPTIONS, Weighted Average Exercise Price $ 6.10 Ìý
ALL OPTIONS, Outstanding No. of Options 58,000 Ìý
EXERCISABLE OPTIONS, Weighted Average Exercise Price $ 6.12 Ìý
EXERCISABLE OPTIONS, Weighted Average Remaining Life In Years 1 year 2 months 15 days Ìý
EXERCISABLE OPTIONS, Exercisable No. of Options 58,000 Ìý
$7.17 to $7.55 Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý
ALL OPTIONS, Exercise Price Lower Range $ 7.17 Ìý
ALL OPTIONS, Exercise Price Upper Range 7.55 Ìý
ALL OPTIONS, Weighted Average Exercise Price $ 7.44 Ìý
ALL OPTIONS, Outstanding No. of Options 443,425 Ìý
EXERCISABLE OPTIONS, Weighted Average Exercise Price $ 7.42 Ìý
EXERCISABLE OPTIONS, Weighted Average Remaining Life In Years 2 years 4 months 9 days Ìý
EXERCISABLE OPTIONS, Exercisable No. of Options 345,425 Ìý
$8.57 to $9.07 Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý
ALL OPTIONS, Exercise Price Lower Range $ 8.57 Ìý
ALL OPTIONS, Exercise Price Upper Range 9.07 Ìý
ALL OPTIONS, Weighted Average Exercise Price $ 8.98 Ìý
ALL OPTIONS, Outstanding No. of Options 157,749 Ìý
EXERCISABLE OPTIONS, Weighted Average Exercise Price $ 8.98 Ìý
EXERCISABLE OPTIONS, Weighted Average Remaining Life In Years 1 year 8 months 8 days Ìý
EXERCISABLE OPTIONS, Exercisable No. of Options 157,749 Ìý