CONCENTRATION OF RISK - Revenues and Accounts Receivable From Our Largest Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Concentration Risk [Line Items]
Accounts receivable	$ 22,476		$ 22,476		$ 24,729
Total Revenue [Member] | Customer Concentration Risk [Member] | Major Customer A [Member]
Concentration Risk [Line Items]
Concentration risk, percentage (less than 1% for contracts with U.S. government agencies)	45.00%	48.00%	33.00%	29.00%
Total Revenue [Member] | Customer Concentration Risk [Member] | Major Customer B [Member]
Concentration Risk [Line Items]
Concentration risk, percentage (less than 1% for contracts with U.S. government agencies)	36.00%	39.00%	57.00%	56.00%
Total Revenue [Member] | Customer Concentration Risk [Member] | Major Customer C [Member]
Concentration Risk [Line Items]
Concentration risk, percentage (less than 1% for contracts with U.S. government agencies)	7.00%	2.00%	5.00%	1.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Major Customer A [Member]
Concentration Risk [Line Items]
Accounts receivable	$ 10,262		$ 10,262
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Major Customer B [Member]
Concentration Risk [Line Items]
Accounts receivable	6,117		6,117
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Major Customer C [Member]
Concentration Risk [Line Items]
Accounts receivable	$ 3,235		$ 3,235