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Stock Options and Restricted Stock Awards (Details) (USD $)
 3 Months Ended 6 Months Ended 0 Months Ended
Sep. 30, 2013
Stock Options [Member]
Sep. 30, 2013
Stock Options [Member]
Sep. 30, 2012
Stock Options [Member]
Sep. 03, 2013
Restricted Stock [Member]
Installment
Summary of Black-Scholes option pricing model assumptions used to derive weighted average fair value of stock options granted [Abstract]        
Weighted average risk free interest rate (in hundredths)   1.94% 1.03%  
Weighted average expected holding period (years)   5 years 11 months 16 days 6 years 5 months 23 days  
Weighted average expected volatility (in hundredths)   48.52% 42.86%  
Weighted average expected dividend yield (in hundredths)   0.00% 0.00%  
Weighted average fair value of options granted (in dollars per share)   $ 4.42 $ 3.04  
Number of Shares [Roll Forward]        
Outstanding at beginning of period (in shares)   1,970,084    
Granted (in shares) 266,000 272,000 6,000  
Exercised (in shares)   0    
Cancelled (in shares)   (152,450)    
Outstanding at end of period (in shares) 2,089,634 2,089,634    
Weighted Average Exercise Price [Roll Forward]        
Outstanding at beginning of period (in dollars per share)   $ 8.73    
Granted (in dollars per share)   $ 9.25    
Exercised (in dollars per share)   $ 0    
Cancelled (in dollars per share)   $ 7.44    
Outstanding at end of period (in dollars per share) $ 8.89 $ 8.89    
Number of stock options exercisable (in shares) 1,515,933 1,515,933    
Weighted average exercise price of stock options exercisable (in dollars per share) $ 9.31 $ 9.31    
Number of Shares [Roll Forward]        
Non-vested at beginning of period (in shares)   420,401    
Granted (in shares) 266,000 272,000 6,000  
Vested (in shares)   (6,000)    
Cancelled (in shares)   (112,700)    
Non-vested at end of period (in shares) 573,701 573,701    
Weighted Average Grant Date Fair Value [Roll Forward]        
Non-vested at beginning of period (in dollars per share)   $ 2.93    
Granted (in dollars per share)   $ 4.42 $ 3.04  
Vested (in dollars per share)   $ 3.98    
Cancelled (in dollars per share)   $ 2.92    
Non-vested at end of period (in dollars per share) $ 3.63 $ 3.63    
Total unrecognized compensation expense $ 1,998,000 $ 1,998,000    
Weighted average vesting period over which compensation expense is expected to be recognized   2 years 2 months 12 days    
Summary of restricted stock transactions [Abstract]        
Granted (in shares)       138,000
Closing market price of shares granted (in dollars per share)       $ 9.32
Number of equal annual installments in which awards vest       3
Fair value to be recognized as compensation expense       $ 1,286,000