SEGMENTS INFORMATION (Major Customers) (Details) - Customer Concentration Risk	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Revenue, Segment Benchmark [Member] | Operating Segments
Revenue, Major Customer [Line Items]
Number of customers	0	0	0	0
Accounts Receivable | Billed Revenues
Revenue, Major Customer [Line Items]
Number of customers			0		0
Accounts Receivable | Unbilled Revenues
Revenue, Major Customer [Line Items]
Number of customers			0		0