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RELATED PARTY TRANSACTIONS (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 01, 2018
USD ($)
Mar. 01, 2018
USD ($)
Feb. 01, 2017
USD ($)
Mar. 01, 2015
USD ($)
Office
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
BKF Capital                  
RELATED PARTY TRANSACTIONS                  
Revenue from related parties         $ 750 $ 750 $ 3,000 $ 3,000  
Costs paid to related party         6,468   16,328   $ 0
Receivable from related party         0   0   0
BKF Capital | Westlake Village, CA office                  
RELATED PARTY TRANSACTIONS                  
Number of offices leased out | Office       1          
Revenue from related parties per month     $ 250 $ 1,000          
BKF Capital | Charleston, SC office                  
RELATED PARTY TRANSACTIONS                  
Revenue from related parties per month $ 1,255 $ 2,465              
Qualstar                  
Due from Qualstar                  
Due from Qualstar, beginning balance         10,000   17,000 2,000 2,000
Billed to Qualstar by Interlink         36,000 1,000 181,000 8,000  
Paid by Qualstar to Interlink         (46,000) (1,000) (198,000) (10,000)  
Due from Qualstar, end balance                 17,000
Due to Qualstar                  
Due to Qualstar, beginning balance         1,000 1,000   1,000 $ 1,000
Billed to Interlink by Qualstar         4,000 3,000 11,000 8,000  
Paid by Interlink to Qualstar         (4,000) (3,000) (10,000) (8,000)  
Due to Qualstar, end balance         $ 1,000 $ 1,000 $ 1,000 $ 1,000