RELATED PARTY TRANSACTIONS (Details)		12 Months Ended
	Mar. 01, 2015 USD ($) item	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
BKF Capital
RELATED PARTY TRANSACTIONS
Number of offices leased out | item	1
Revenue from related parties per month	$ 1,000
Revenue from related parties		$ 12,000	$ 10,000
Receivable from related party		1,000	0
Qualstar
Due from Qualstar
Due from Qualstar, beginning balance			5,000
Billed to Qualstar by Interlink		13,000	15,000
Paid by Qualstar to Interlink		(11,000)	(20,000)
Due from Qualstar, end balance		2,000
Due to Qualstar
Due to Qualstar, beginning balance		6,000	2,000
Billed to Interlink by Qualstar		34,000	61,000
Paid by Interlink to Qualstar		(39,000)	(57,000)
Due to Qualstar, end balance		$ 1,000	$ 6,000