v3.8.0.1
DEBT AND CREDIT ARRANGEMENTS - Narrative (Details) - USD ($)
1 Months Ended 12 Months Ended
Dec. 31, 2017
Oct. 12, 2017
Apr. 30, 2017
Dec. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Nov. 30, 2015
May 31, 2014
Debt Instrument [Line Items]                  
Mortgage balance $ 25,452,000     $ 25,452,000 $ 25,452,000 $ 17,538,000      
Current principal due 113,000     113,000 113,000 107,000      
Interest expense         2,490,000 1,476,000 $ 1,230,000    
Note payable to Squadron                  
Debt Instrument [Line Items]                  
Interest rate     11.00%         10.00% 10.00%
Additional revolving loan commitment     $ 16,000,000         $ 7,000,000  
Deferred financing cost     $ 1,000,000            
Extension fee payable period     3 years            
Mortgage balance $ 20,000,000     $ 20,000,000 20,000,000 11,401,000      
Debt instrument, extension fee cancelled   $ 667,000              
Interest expense         $ 2,490,000 1,476,000 $ 1,230,000    
Mortgage payable to affiliate                  
Debt Instrument [Line Items]                  
Interest rate 5.00%     5.00% 5.00%        
Mortgage balance $ 1,531,000     $ 1,531,000 $ 1,531,000 1,637,000      
Monthly interest and principal installments         16,000        
Current principal due 113,000     113,000 113,000 $ 107,000      
Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Revolving credit facility 15,000,000     15,000,000 15,000,000        
Level 2 | Note payable to Squadron                  
Debt Instrument [Line Items]                  
Remaining indebtedness $ 18,401,000     $ 18,401,000 $ 18,401,000        
Three month LIBOR | Note payable to Squadron                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate       8.61%          
Debt instrument, interest rate, effective percentage 10.00%     10.00% 10.00%        
Three month LIBOR | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate 8.61%                
Debt instrument, interest rate, effective percentage 10.00%     10.00% 10.00%