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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Mar. 31, 2013
Summary of Significant Accounting Policies [Abstract]  
Reconciliation of basic and diluted net (loss) income per share
The following presents a reconciliation of basic and diluted net (loss) income per share.
 
 
 
Years Ended March 31,
 
 
 
2013
 
 
2012
 
 
2011
 
Net (loss) income
 
$
(91,511,000
)
 
$
(48,514,000
)
 
$
12,220,000
 
 
 
 
 
 
 
 
 
 
 
 
 
Basic shares
 
 
14,327,310
 
 
 
12,442,684
 
 
 
12,042,428
 
Effect of dilutive stock options and warrants
 
 
-
 
 
 
-
 
 
 
291,903
 
Diluted shares
 
 
14,327,310
 
 
 
12,442,684
 
 
 
12,334,331
 
Net (loss) income per share:
 
 
 
 
 
 
 
 
 
 
 
 
Basic
 
$
(6.39
)
 
$
(3.90
)
 
$
1.01
 
 
 
 
 
 
 
 
 
 
 
 
 
Diluted
 
$
(6.39
)
 
$
(3.90
)
 
$
0.99
 
 
Black-Scholes option pricing model assumptions used to derive weighted average fair value of stock options granted
The table below summarizes the Black-Scholes option pricing model assumptions used to derive the weighted average fair value of the stock options granted during the periods noted.

 
Years Ended March 31,
 
 
 
2013
 
 
2012
 
 
2011
 
Weighted average risk free interest rate
 
 
1.17
%
 
 
1.74
%
 
 
2.09
%
Weighted average expected holding period (years)
 
 
6.60
 
 
 
6.29
 
 
 
5.73
 
Weighted average expected volatility
 
 
44.25
%
 
 
40.28
%
 
 
38.87
%
Weighted average expected dividend yield
 
 
-
 
 
 
-
 
 
 
-
 
Weighted average fair value of options granted
 
$
2.92
 
 
$
4.21
 
 
$
3.82