INCOME TAXES (Detail Textuals) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
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		$ 382,781
Net operating loss generated from excess tax deduction from share based awards		15,080
State income tax
Operating Loss Carryforwards [Line Items]
Net operating loss		202,137
Net operating loss generated from excess tax deduction from share based awards		929
Research and development credit carryforwards
Operating Loss Carryforwards [Line Items]
Net operating loss		$ 27,779