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Stock-Based Compensation Plans (Tables)
 12 Months Ended
Apr. 30, 2025
Share-Based Payment Arrangement [Abstract]  
Summary of Stock Option Plan Comparison
Restated Option Plan2024 Equity Incentive Plan
Minimum exercise price as a percentage of fair market value at date of grant100%100%
Last expiration date for outstanding optionsMay 9, 2034January 20, 2035
Shares available for grant at April 30, 2025-426,258
Summary of Stock-Based Compensation, Valuation Assumptions
The fair value of options granted is estimated on the date of grant using the Black-Scholes option pricing model based on the assumptions in the table below.
 Years Ended April 30,
 202520242023
Expected term (years)4.93.95.5
Risk-free interest rate4.93%4.06%3.60%
Volatility61%56%55%
Dividend yield---
Summary of Stock Incentive Plan
The following is an aggregate summary of the activity in the stock incentive plan from April 30, 2022 to April 30, 2025:
Number of Options
Exercise Price per Share
Proceeds on Exercise
Weighted Average Exercise Price per Share
  (in thousands) 
Outstanding at April 30, 2022501,400 $39,232 $78.25 
Granted140,000
$61.02 to $94.59
9,687 69.19 
Exercised(28,000)
$ 44.52 to $ 53.02
(1,439)51.38 
Cancelled--
Outstanding at April 30, 2023613,400 $47,480 $77.41 
Granted197,486
$ 70.57 to $ 86.30
14,279 72.30 
Exercised(35,000)
$ 36.54 to $ 54.85
(1,828)52.23 
Cancelled(40,000)
          $ 109.06
(4,362)109.06 
Outstanding at April 30, 2024735,886 $55,569 $75.51 
Granted29,781
$42.25 to $61.32
$1,703 57.19 
Exercised--
Cancelled(74,000)
$46.23 to $150.83
(4,700)63.51 
Outstanding at April 30, 2025691,667$52,572 $76.01 
Summary of Option Exercised
The Company had the following options exercised for the periods indicated. The impact of these cash receipts is included in financing activities in the accompanying Consolidated Statements of Cash Flows.
Years Ended April 30,
(Dollars in thousands except option data)202520242023
 
Options Exercised- 35,00028,000
Cash Received from Options Exercised$- $- $1,216 
Intrinsic Value of Options Exercised$- $1,145 $1,412 
Summary of Restricted Stock Award Activity
The following is a summary of the Restricted Stock Award activity in the Company’s stock incentive plan:
 
Number of Shares
Weighted Average
Grant Date
Fair Value
   
Unvested shares at April 30, 2022181,114$55.76 
Shares granted40,47068.78 
Shares vested(29,500)35.31 
Shares cancelled(10,301)69.10 
Unvested shares at April 30, 2023181,783$61.22 
Shares granted74,64768.56 
Shares vested(13,037)62.78 
Shares cancelled(32,183)61.14 
Unvested shares at April 30, 2024211,210$63.73 
Shares granted89,86255.67 
Shares vested(34,583)71.73 
Shares cancelled(14,620)73.53 
Unvested shares at April 30, 2025251,869$59.19