v3.26.1
Share-based Payments (Tables)
 12 Months Ended
Mar. 31, 2026
Share-based Payments [Abstract]  
Black-Scholes Option Pricing Model Assumptions Used to Derive Weighted Average Fair Value of Stock Options Granted The following summarizes the Black-Scholes option-pricing model assumptions used to derive the weighted average fair value of the stock options granted during the year ended March 31, 2024.
       
 
Year Ended March 31, 
 
2024 
Weighted average risk free interest rate
  4.53 %
Weighted average expected holding period (years)
  6.57  
Weighted average expected volatility
  51.29 %
Weighted average expected dividend yield
  -  
Weighted average fair value of options granted
  3.75  
Stock Option Transactions
The following is a summary of stock option transactions:
 
             
     Number of  
 Weighted Average 
     Shares  
 Exercise Price 
Outstanding at March 31, 2025
   1,053,561   $ 20.20 
Exercised
   (6,466)   $ 15.59 
Forfeited/Cancelled
   (13,061)   $ 20.08 
Expired
   (68,200)   $ 31.13 
Outstanding at March 31, 2026
   965,834   $ 19.47 
Summary of Options Outstanding
The following summarizes information about the options outstanding at March 31, 2026:

                                 
                                 
    Options Outstanding         Options Exercisable    
               Weighted                     Weighted       
          Weighted      Average                Weighted      Average       
          Average      Remaining      Aggregate           Average      Remaining      Aggregate  
Range of
        Exercise      Life      Intrinsic           Exercise      Life      Intrinsic  
Exercise price
  Shares    Price    In Years    Value    Shares   
Price    In Years   
Value 
                                         
$9.32 to $17.38
  322,923   $12.89    5.49   $227,000    279,678   $13.44    5.18   $152,000 
$19.00 to $22.73
  399,287    19.58    2.78         399,287    19.58    2.78      
$25.21 to $27.40
  124,500    27.33    1.22         124,500    27.33    1.22      
$28.68 to $30.31
  119,124    28.72    0.25         119,124    28.72    0.25      
                                         
    965,834   $19.47    3.17   $227,000    922,589   $19.95    2.97   $152,000 
Restricted Stock Units Activity
The following is a summary of non-vested RSUs:
 
         
    Number of
Shares 		    Weighted Average
Grant Date Fair
Value 		 
           
Outstanding at March 31, 2025
  505,373   $7.26 
Granted
  487,597   $10.35 
Vested
  (289,872)   $7.99 
Forfeited/Cancelled
  (18,378)   $11.62 
Outstanding at March 31, 2026
  684,720   $9.03 
Monte Carlo Valuation Model Assumptions Used in Determining Fair Value of TSR Awards The following table summarizes the assumptions used in determining the fair value of the awards subject to market conditions:
             
   
Year Ended March 31,
 
   
2026
   
2025
   
2024
 
Risk free interest rate
  3.86%   
4.21-4.45
%   
4.32-4.35 
%
Expected life in years
  0.7-3.0    3    0.2-1.8 
Expected volatility of MPA common stock
  66.8%   
59.8-62.8
%   
54.2-55.1
%
Average correlation coefficient of peer companies
  15.7%   
16.5-17.4
     -  
Expected dividend yield
   -      -      -  
Grant date fair value
 $
     7.33-12.68
   $
     8.65-8.88
   $
     3.57-8.37
 
Performance Stock Units Activity
The following is a summary of non-vested PSUs:
 
    Number of
Shares 		    Weighted Average
Grant Date Fair
Value 		 
Outstanding at March 31, 2025
  764,387   $7.42 
Granted
  353,778   $10.57 
Vested
  (294,540)   $6.77 
Forfeited/Cancelled
  (79,083)   $13.36 
Outstanding at March 31, 2026
  744,542   $8.54