INCOME TAX - Components of Income Tax (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Current federal taxes	$ 0	$ (2)	$ (8)
Current state taxes	120	112	98
Current foreign taxes	545	0	0
Current tax expense (benefit)	665	110	90
Deferred:
Deferred federal taxes	0	(4,189)	0
Deferred state taxes	0	(703)	0
Deferred foreign taxes	(433)	0	0
Deferred tax expense (benefit)	(433)	(4,892)	0
Income tax benefit	$ 232	$ (4,782)	$ 90