RECENTLY ISSUED AND RECENTLY ADOPTED ACCOUNTING PRONOUNCEMENTS RECENTLY ISSUED AND RECENTLY ADOPTED ACCOUNTING PRONOUNCEMENTS (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jan. 01, 2017
Additional paid-in capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change for the adoption of ASU 2016.09	$ 446
Accounting Standards Update 2016-09 [Member] | Additional paid-in capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change for the adoption of ASU 2016.09		$ 400
Accounting Standards Update 2016-09 [Member] | Accumulated deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting change for the adoption of ASU 2016.09	$ 400