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Credit Facility (Details Textual) - USD ($)
1 Months Ended 9 Months Ended 13 Months Ended
Jul. 03, 2015
Dec. 31, 2011
Sep. 30, 2015
Apr. 30, 2012
Jul. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]            
Borrowings under credit facility, interest payable description   at either (i) the bank’s prime rate or (ii) LIBOR plus 2.25%        
Financing Agreements | Vehicles            
Debt Instrument [Line Items]            
Repayment period (up to three years)     3 years      
Interest rate percentage, minimum     1.90%      
Interest rate percentage, maximum     3.90%      
Financing agreements     $ 106,000     $ 110,000
Secured Debt            
Debt Instrument [Line Items]            
Borrowings under credit facility, interest payable description   applicable interest rate was LIBOR plus 2.25% (2.5% as of June 30, 2015)        
LIBOR | Revolving Credit Facility            
Debt Instrument [Line Items]            
Borrowings under credit facility, interest related to Libor rate   2.25%        
East West Bank | Revolving Credit Facility            
Debt Instrument [Line Items]            
Revolving line of credit         $ 25,000,000  
Amount available under the Revolving Line of Credit     $ 20,400,000      
Percentage of equity interests pledged         100.00%  
Annual commitment fee amount $ 125,000          
East West Bank | Minimum | Revolving Credit Facility            
Debt Instrument [Line Items]            
Unused commitment fee percentage 0.30%          
East West Bank | Maximum | Revolving Credit Facility            
Debt Instrument [Line Items]            
Unused commitment fee percentage 0.50%          
East West Bank | Prime Rate | Minimum | Revolving Credit Facility            
Debt Instrument [Line Items]            
Borrowings under credit facility, interest related to Libor rate 0.00%          
East West Bank | Prime Rate | Maximum | Revolving Credit Facility            
Debt Instrument [Line Items]            
Borrowings under credit facility, interest related to Libor rate 0.50%          
East West Bank | LIBOR | Minimum | Revolving Credit Facility            
Debt Instrument [Line Items]            
Borrowings under credit facility, interest related to Libor rate 2.75%          
East West Bank | LIBOR | Maximum | Revolving Credit Facility            
Debt Instrument [Line Items]            
Borrowings under credit facility, interest related to Libor rate 3.25%          
Equipment Term Loan | Secured Debt            
Debt Instrument [Line Items]            
Percentage of eligible equipment purchases financed       80.00%    
Amount borrowed under Equipment Term Loan       $ 5,000,000