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Long-term Debt (Details) (USD $)
 1 Months Ended 3 Months Ended
Jul. 31, 2013
May 31, 2012
Jun. 30, 2013
Mar. 31, 2013
Debt        
Line of credit     $ 1,500,000  
Long-term portion     1,500,000 4,000,000
Effective rate of interest (as a percent)     1.50%  
Fiscal year        
2015     1,500,000  
Line of credit     1,500,000  
Credit facility
        
Debt        
Debt instrument, term     3 years  
Number of trailing quarters of EBITDA used to calculate ratio of funded debt to EBITDA     4  
Number of defined tiers of ratio of funded debt to EBITDA     4  
Ratio of funded debt to EBIDTA required to be maintained     2.5  
Credit facility | Minimum
        
Debt        
Unused capacity fee (as a percent)     0.15%  
High end of ratio of funded debt to the entity's trailing four quarters of EBIDTA for unused capacity fees     2  
Fixed charge coverage ratio, required to be maintained     1.5  
Credit facility | Maximum
        
Debt        
Unused capacity fee (as a percent)     0.30%  
Low end of ratio of funded debt to the entity's trailing four quarters of EBIDTA for unused capacity fees     1  
Credit facility | LIBOR
        
Debt        
Description of variable rate basis     LIBOR  
Credit facility | LIBOR | Minimum
        
Debt        
Spread on variable rate (as a percent)     1.25%  
Credit facility | LIBOR | Maximum
        
Debt        
Spread on variable rate (as a percent)     2.00%  
Credit facility | CBFR using bank prime rate
        
Debt        
Description of variable rate basis     Prime rate  
Credit facility | CBFR using bank prime rate | Minimum
        
Debt        
Spread on variable rate (as a percent)     (0.50%)  
Credit facility | CBFR using bank prime rate | Maximum
        
Debt        
Spread on variable rate (as a percent)     (1.25%)  
Credit facility | CBFR using one month LIBOR
        
Debt        
Description of variable rate basis     One month LIBOR  
Spread on variable rate used to calculate CBFR (as a percent)     2.50%  
Credit facility | CBFR using one month LIBOR | Minimum
        
Debt        
Spread on variable rate (as a percent)     (0.50%)  
Credit facility | CBFR using one month LIBOR | Maximum
        
Debt        
Spread on variable rate (as a percent)     (1.25%)  
Letters of credit
        
Debt        
Maximum borrowing capacity     1,000,000  
Revolving line of credit
        
Debt        
Line of credit     1,500,000 4,000,000
Maximum borrowing capacity     20,000,000  
Borrowings for facilitating acquisition   11,000,000    
Principal repayments 1,000,000   2,500,000  
Outstanding borrowings     1,500,000  
Fiscal year        
Line of credit     $ 1,500,000 $ 4,000,000