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Stock-based Payments (Tables)
 12 Months Ended
Apr. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Summary of allocation of share based compensation expense Stock-based compensation costs were recorded as follows (in thousands):
 Year Ended April 30,
 20242023
General and administrative$706 $505 
Sales and marketing168 192 
Research and development21 19 
TOS cost of sales223 148 
Total stock-based compensation expense$1,118 $864 
Summary of valuation assumptions for stock options
Black-Scholes weighted average assumptions used to calculate the fair value of options granted during the years ended April 30, 2024 and 2023 were as follows:
 Year Ended April 30,
20242023
Expected term in years
6
 6
Risk-free interest rates
4.0% - 4.5%
2.9% - 3.9%
Volatility
63% - 64%
61% - 63%
Dividend yield
0%
0%
Summary of stock option activity The Company’s stock options activity and related information as of and for the years ended April 30, 2024 and 2023 is as follows:
 
Directors
and
Employees		Non-
Employees		TotalWeighted
Average
Exercise
Price		Weighted
Average
Remaining
Contractual
Life (Years)		Aggregate
Intrinsic
Value
Outstanding, May 1, 20231,739,336 36,331 1,775,667 $4.80 4.6$2,683,000 
Granted444,730 — 444,730 6.08 9.5$— 
Exercised(155,449)— (155,449)2.31   
Canceled(50,535)— (50,535)4.82   
Forfeited(40,750)— (40,750)6.21   
Expired(54,166)— (54,166)12.78   
Outstanding, April 30, 2024
1,883,166 36,331 1,919,497 5.04 5.2$2,172,000 
Vested and expected to vest as of April 30, 2024
1,883,166 36,331 1,919,497 5.04 5.2$2,172,000 
Exercisable as of April 30, 2024
1,481,145 3,750 1,484,895 4.65 4.2$2,172,000 
 
Directors
and
Employees		Non-
Employees		TotalWeighted
Average
Exercise
Price		Weighted
Average
Remaining
Contractual
Life (Years)		Aggregate
Intrinsic
Value
Outstanding, May 1, 20221,617,324 40,915 1,658,239 4.514.9$6,131,000 
Granted186,720 — 186,720 7.22 9.4— 
Exercised(36,209)— (36,209)3.21   
Canceled(13,874)— (13,874)3.93   
Forfeited(14,625)— (14,625)7.94   
Expired— (4,584)(4,584)5.40   
Outstanding, April 30, 2023
1,739,336 36,331 1,775,667 4.80 4.6$2,683,000 
Vested and expected to vest as of April 30, 2023
1,739,336 36,331 1,775,667 4.80 4.6$2,683,000 
Exercisable as of April 30, 2023
1,436,932 1,875 1,438,807 4.35 3.8$2,681,000