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NOTES PAYABLE AND CREDIT AGREEMENT (Details)
9 Months Ended 12 Months Ended
Dec. 05, 2013
USD ($)
Sep. 30, 2015
USD ($)
Installment
Dec. 31, 2014
USD ($)
Installment
Dec. 31, 2013
USD ($)
Debt Instrument [Line Items]        
Payments/Long term debt, Total   $ 49,091,000 $ 35,617,000  
Less current portion   (1,412,000) (883,000)  
Long term portion   $ 47,679,000 $ 34,734,000  
Percentage of interest accrued   3.25%    
Number of annual installments | Installment   2    
Balance of notes payable   $ 250,059    
Notes Payable, Other Payables [Member]        
Debt Instrument [Line Items]        
Average effective interest rate   3.25% 3.25%  
Remaining revolving credit outstanding       $ 250,000
Aggregate amount of notes payable   $ 1,350,000 $ 466,172  
Aggregate principal installments   $ 325,000 $ 233,086  
Number of annual installments | Installment   2 2  
Notes Payable, Other Payables [Member] | Noncontrolling Interest [Member]        
Debt Instrument [Line Items]        
Average effective interest rate   3.25%    
Aggregate amount of notes payable   $ 1,240,659    
Aggregate principal installments   $ 620,329    
Number of annual installments | Installment   2    
Minimum [Member]        
Debt Instrument [Line Items]        
Spread on Libor variable rate   1.50%    
Spread on base variable rate   0.10%    
Percentage of unused commitment fee   0.10%    
Maximum [Member]        
Debt Instrument [Line Items]        
Spread on Libor variable rate   2.50%    
Spread on base variable rate   1.00%    
Percentage of unused commitment fee   0.25%    
Credit Facility [Member]        
Debt Instrument [Line Items]        
Payments/Long term debt, Total   $ 46,000,000 $ 34,500,000  
Average effective interest rate   2.20%    
Revolving credit facility commitment $ 125,000,000      
Maturity Date Nov. 30, 2018      
Remaining revolving credit outstanding   $ 79,000,000    
3.25 % Notes Payable due in Next Year [Member]        
Debt Instrument [Line Items]        
Payments/Long term debt, Total   3,091,000 $ 1,117,000  
Annual installments   $ 1,412,000    
Percentage of interest accrued   3.25%