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Share-based Payments (Tables)
 3 Months Ended
Jun. 30, 2024
Share-based Payments [Abstract]  
Stock Option Transactions
The following is a summary of stock option transactions:

   
Number of
    
Weighted Average
  
 
  
Shares
    
Exercise Price
  
Outstanding at March 31, 2024
    
1,108,017
    
$
20.29
  
Granted
    
-
    
$
-
  
Exercised
    
-
 
$
-
  
Forfeited/Cancelled
    
(1,383
)
  
$
17.29
  
Expired     (36,733 )   $ 22.93  
Outstanding at June 30, 2024
    
1,069,901
    
$
20.21
  
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, 2024
    
240,923
    
$
12.23
  
Granted
    
207,050
    
$
6.69
  
Vested
    
(86,559
)
  
$
16.63
  
Forfeited/Cancelled
    
(762
)
  
$
11.04
  
Outstanding at June 30, 2024
    
360,652
    
$
8.00
  
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 these awards subject to market conditions:

    Three Months Ended  
   
June 30,
  
   
2024
    
2023
  
Risk free interest rate
    
4.45
%
     4.32 %
Expected life in years
     3.0
       0.8-1.8  
Expected volatility of MPA common stock
    
59.80
%
    
54.20
%
Average correlation coefficient of peer companies
    
16.50
%
     -
 %
Expected dividend yield
    
-
       -  
Grant date fair value
  
$
8.65
    
$
3.57-5.06
  
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, 2024
    
773,923
    
$
7.73
  
Granted
    
155,391
    
$
8.65
  
Added by performance factor
    10,952
     $
22.27
  
Vested
    
(32,848
)
  
$
22.27
  
Forfeited/Cancelled
    
(52,137
)
  
$
23.27
  
Outstanding at June 30, 2024
    
855,281
    
$
6.58