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Line of Credit - Additional Information (Details) - USD ($)
1 Months Ended
Aug. 31, 2014
Jan. 31, 2016
Debt Instrument [Line Items]    
Line of credit   $ 0
Revolving Line of Credit    
Debt Instrument [Line Items]    
Line of credit facility, term 2 years  
Line of credit facility, maximum borrowing capacity $ 15,000,000  
Percentage of accounts receivable qualifying for revolving credit agreement 80.00%  
Revolving Line of Credit | Prime Rate    
Debt Instrument [Line Items]    
Line of credit facility, interest rate 1.00%