SEGMENT REPORTING AND CONCENTRATIONS, Concentration Risk (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Concentration Risk [Line Items]
Accounts and other receivables	$ 8,945	$ 6,320	$ 8,945	$ 6,320	$ 11,620
Sales Revenue [Member] | Credit Concentration Risk [Member] | GE Healthcare [Member]
Concentration Risk [Line Items]
Percentage of revenue	38.00%	65.00%	38.00%	73.00%
Percentage of accounts and other receivables	38.00%	65.00%	38.00%	73.00%
Accounts and Other Receivables [Member] | Credit Concentration Risk [Member] | GE Healthcare [Member]
Concentration Risk [Line Items]
Percentage of revenue			56.00%		69.00%
Accounts and other receivables	$ 5,000		$ 5,000		$ 8,100
Percentage of accounts and other receivables			56.00%		69.00%