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Share-based Payments (Tables)
 6 Months Ended
Sep. 30, 2019
Share-based Payments [Abstract]  
Black-Scholes Option Pricing Model Assumptions used to Derive Weighted Average Fair Value of Stock Options Granted
The following assumptions were used to derive the weighted average fair value of the stock options granted:

  
Six Months Ended
September 30,
 
  
2019
  
2018
 
Weighted average risk free interest rate
  
1.77
%
  
2.82
%
Weighted average expected holding period (years)
  
5.70
   
5.94
 
Weighted average expected volatility
  
42.51
%
  
43.98
%
Weighted average expected dividend yield
  
-
   
-
 
Weighted average fair value of options granted
 
$
8.28
  
$
8.71
 
Stock Option Transactions
The following is a summary of stock option transactions:

  
Number of
Shares
  
Weighted Average
Exercise Price
 
Outstanding at March 31, 2019
  
1,337,165
  
$
17.58
 
Granted
  
300,039
  
$
19.75
 
Exercised
  
(52,800
)
 
$
7.67
 
Forfeited
  
(5,171
)
 
$
20.62
 
Outstanding at September 30, 2019
  
1,579,233
  
$
18.31
 
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, 2019
  
243,134
  
$
21.75
 
Granted
  
79,851
  
$
19.93
 
Vested
  
(133,488
)
 
$
21.11
 
Forfeited
  
(1,101
)
 
$
21.40
 
Outstanding at September 30, 2019
  
188,396
  
$
21.44