CONVERTIBLE REDEEMABLE PREFERRED STOCK (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Jun. 25, 2013	Apr. 30, 2012
Temporary Equity [Line Items]
Temporary equity	$ 259,661		$ 259,661		$ 254,899
[Dilutive effect of common stock warrants, employee stock options and RSUs]	$ (2,405)	$ (4,440)	$ (4,762)	$ (8,950)
Series B Preferred Stock [Member]
Temporary Equity [Line Items]
Preferred stock, shares issued	200,000		200,000		200,000
Convertible Preferred Stock, Estimated Common Stock Issued in Future Conversion	107,100,000		107,100,000
Preferred stock, par value (in dollars per share)	$ 0.08		$ 0.08		$ 0.08	$ 0.08
Sale of stock, price per share						$ 1,000
Preferred Stock, Conversion Price	$ 2.42		$ 2.42
4 - 5 years [Member] | Series B Preferred Stock [Member]
Temporary Equity [Line Items]
Preferred stock, dividend rate, percentage	3.75%
T W Investor [Member]
Temporary Equity [Line Items]
Ownership percentage, related party	42.40%		42.40%
Minimum [Member] | T W Investor [Member] | Common Class A [Member]
Temporary Equity [Line Items]
Ownership percentage, related party							49.90%