INCOME TAXES (Detail Textuals) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Operating Loss Carryforwards [Line Items]
Increase in ownership percentage of certain stockholders or public groups	more than 50 percentage points
Ownership change, increase in ownership percentage, term	3 years
Federal income tax
Operating Loss Carryforwards [Line Items]
Net operating loss	$ 357,122
Net operating loss generated from excess tax deduction from share based awards	15,020
State income tax
Operating Loss Carryforwards [Line Items]
Net operating loss	176,712
Net operating loss generated from excess tax deduction from share based awards	868
Research and development credit carryforwards
Operating Loss Carryforwards [Line Items]
Net operating loss	$ 27,750