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Share-based Payments (Tables)
 12 Months Ended
Mar. 31, 2022
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 years ended March 31, 2021 and 2020.

   
Years Ended March 31,
  
   
2021
    
2020
  
             
Weighted average risk free interest rate
    
0.44
%
    
1.76
%
Weighted average expected holding period (years)
    
5.96
      
5.70
  
Weighted average expected volatility
    
44.90
%
    
42.50
%
Weighted average expected dividend yield
    
-
      
-
  
Weighted average fair value of options granted
  
$
6.43
    
$
8.27
  
Stock Option Activity
The following is a summary of stock option transactions:

 
  
Number of
Shares
    
Weighted Average
Exercise Price
  
 
            
Outstanding at March 31, 2021
    
1,744,885
    
$
17.51
  
Granted
    
-
    
$
-
  
Exercised
    
(35,429
)
  
$
15.07
  
Forfeited
    
(13,957
)
  
$
20.74
  
Outstanding at March 31, 2022
    
1,695,499
    
$
17.53
  
Summary of Options Outstanding
The following summarizes information about the options outstanding at March 31, 2022:

     
Options Outstanding
  
Options Exercisable
Range of
Exercise price
    
Shares
    
Weighted
Average
Exercise
Price
    
Weighted
Average
Remaining
Life
In Years
  
Aggregate
Intrinsic
Value
  
Shares
    
Weighted
Average
Exercise
Price
    
Weighted
Average
Remaining
Life
In Years
  
Aggregate
Intrinsic
Value
$
5.20 to $6.47
      
301,234
    
$
6.46
      
0.74
  
 
    
301,234
    
$
6.46
      
0.74
  
 
$
6.48 to $18.20
      
504,241
      
13.40
      
6.02
  
 
    
277,422
      
11.93
      
4.24
  
 
$
18.21 to $22.83
      
468,467
      
19.59
      
6.80
  
 
    
380,927
      
19.51
      
6.69
  
 
$
22.84 to $28.04
      
192,233
      
26.26
      
4.50
  
 
    
192,233
      
26.26
      
4.50
  
 
$
28.05 to $34.17
      
229,324
      
29.62
      
3.95
  
 
    
229,324
      
29.62
      
3.95
  
 
         
1,695,499
    
$
17.53
      
4.84
  
$5,657,000
    
1,381,140
    
$
17.76
      
4.14
  
$5,061,000
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, 2021
    
354,484
    
$
17.22
  
Granted
    
263,703
    
$
21.90
  
Vested
    
(216,617
)
  
$
17.78
  
Forfeited
    
(2,507
)
  
$
20.72
  
Outstanding at March 31, 2022
    
399,063
    
$
19.98
  
Monte Carlo Valuation Model Assumptions Used In Determining The Fair Value Of The TSR Awards
The following table summarizes the assumptions used in determining the fair value of the TSR awards:

   
Year Ended March 31,
  
   
2022
  
Risk free interest rate
    
0.47
%
Expected life in years
    
3
  
Expected volatility of MPA common stock
    
53.70
%
Expected average volatility of peer companies
    
59.30
%
Average correlation coefficient of peer companies
    
26.70
%
Expected dividend yield
    
-
  
Grant date fair value
  
$
26.89
  
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, 2021
    
-
    
$
-
  
Granted
    
84,593
    
$
23.19
  
Vested
    
-
    
$
-
  
Forfeited
    
-
    
$
-
  
Outstanding at March 31, 2022
    
84,593
    
$
23.19