CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS - Schedule of Gross Unrealized Losses and Fair Value of Investments (Details) - Corporate debt securities $ in Thousands	Dec. 31, 2018 USD ($)
Schedule of Cash and Cash Equivalents and Marketable Securities [Line Items]
Fair Value, Less than 12 months	$ 1,205
Gross Unrealized Losses, Less than 12 months	(5)
Fair Value, 12 months or more	0
Gross Unrealized Losses, 12 months or greater	0
Fair Value, Total	1,205
Gross Unrealized Losses, Total	$ (5)