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Debt (Details)
9 Months Ended
May 23, 2017
USD ($)
Aug. 01, 2016
USD ($)
Apr. 06, 2015
Jan. 29, 2015
USD ($)
Aug. 28, 2014
USD ($)
Loan
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Loan and Security Agreement [Abstract]                
Funded amount           $ 5,000,000 $ 11,022,286  
Future Principal Payments [Abstract]                
2017 (remaining)           0    
2018           7,882,000    
2019           10,287,000    
2020           1,831,000    
Total           $ 20,000,000    
Original Loan Agreement [Member]                
Loan and Security Agreement [Abstract]                
Aggregate principal amount of borrowing capacity         $ 10,000,000      
Number of term loans | Loan         3      
Interest rate     9.95%   10.45%      
Adjustment to interest rate     (4.50%)   (4.50%)      
Term for making principal and interest payments           30 months    
Additional interest charged on due date   $ 90,000            
Additional interest rate charged on due date   1.50%            
First Term Loan under Original Loan Agreement [Member]                
Loan and Security Agreement [Abstract]                
Funded amount         $ 3,000,000      
Maturity date           Mar. 01, 2018    
Second Term Loan under Original Loan Agreement [Member]                
Loan and Security Agreement [Abstract]                
Funded amount       $ 3,000,000        
Maturity date           Mar. 01, 2018    
Third Term Loan under Original Loan Agreement [Member]                
Loan and Security Agreement [Abstract]                
Maturity date           Jun. 30, 2015    
Unused borrowing capacity               $ 4,000,000
Amended Loan Agreement [Member]                
Loan and Security Agreement [Abstract]                
Aggregate principal amount of borrowing capacity   $ 20,000,000            
Maturity date           Feb. 03, 2020    
Interest rate   9.15%            
Adjustment to interest rate   (4.50%)            
Term for making principal and interest payments           24 months    
Effective interest rate           9.15%    
Additional interest charged on due date   $ 900,000            
Additional interest rate charged on due date   4.50%            
Prepayment charge during first year following initial closing   2.00%            
Prepayment charge during second year following initial closing   1.00%            
Prepayment charge after second year following initial closing   0.50%            
Event of default rate   5.00%            
First Term Loan under Amended Loan Agreement [Member]                
Loan and Security Agreement [Abstract]                
Face amount   $ 15,000,000            
Second Term Loan under Amended Loan Agreement [Member]                
Loan and Security Agreement [Abstract]                
Funded amount $ 5,000,000