Share-based Payments (Tables)
 6 Months Ended
Sep. 30, 2016
Share-based Payments [Abstract]  
Summary of 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,
 
  
2016
  
2015
 
Weighted average risk free interest rate
  
1.38
%
  
1.73
%
Weighted average expected holding period (years)
  
5.84
   
5.76
 
Weighted average expected volatility
  
47.42
%
  
46.84
%
Weighted average expected dividend yield
  
-
   
-
 
Weighted average fair value of options granted
 
$
13.07
  
$
14.13
 
Summary of stock option transactions
The following is a summary of stock option transactions:

  
Number of
Shares
  
Weighted Average
Exercise Price
 
Outstanding at March 31, 2016
  
984,066
  
$
11.98
 
Granted
  
184,000
  
$
28.67
 
Exercised
  
(83,133
)
 
$
12.60
 
Cancelled
  
-
  
$
-
 
Outstanding at September 30, 2016
  
1,084,933
  
$
14.76
 
Schedule of restricted stock units activity
The following is a summary of non-vested RS:

  
Number of
Shares
 
 
 
 
Weighted Average
Grant Date Fair
Value
 
Non-vested at March 31, 2016
  
153,527
  
$
22.28
 
Granted
  
42,876
  
$
28.54
 
Vested
  
(86,854
)
 
$
17.67
 
Cancelled
  
-
  
$
-
 
Non-vested at September 30, 2016
  
109,549
  
$
28.39