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Share-based Payments (Tables)
 3 Months Ended
Jun. 30, 2023
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, 2023
    
1,232,745
    
$
20.20
  
Granted
    
-
    
$
-
  
Exercised
    
-
 
$
-
  
Forfeited/Cancelled
    
(97,683
)
  
$
19.34
  
Expired     -   $ -  
Outstanding at June 30, 2023
    
1,135,062
    
$
20.28
  
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, 2023
    
429,354
    
$
15.07
  
Granted
    
-
    
$
-
  
Vested
    
(147,215
)
  
$
15.66
  
Forfeited/Cancelled
    
(76,585
)
  
$
13.23
  
Outstanding at June 30, 2023
    
205,554
    
$
15.33
  
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:

    Three Months Ended  
   
June 30,
  
   
2023
    
2022
  
Risk free interest rate
    
4.32
%
    
3.35
%
Expected life in years
     0.8-1.8       3  
Expected volatility of MPA common stock
    
54.20
%
    
51.30
%
Expected average volatility of peer companies
    
-
 %    
62.70
%
Average correlation coefficient of peer companies
    
-
 %    
27.50
%
Expected dividend yield
    
-
      
-
  
Grant date fair value
  
$
3.57-5.06
    
$
16.02
  
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, 2023
    
192,696
    
$
17.48
  
Granted
    
533,856
    
$
4.20
  
Vested
    
-
    
$
-
  
Forfeited
    
-
    
$
-
  
Outstanding at June 30, 2023
    
726,552
    
$
7.73