BASIS OF PRESENTATION AND CERTAIN SIGNIFICANT ACCOUNTING POLICIES, Short Term Investments (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	[1]	Dec. 31, 2019
Short-term Investments [Abstract]
Payments to acquire short-term investments	$ 1,697	$ 5,000
US Treasuries [Member]
Short-term Investments [Abstract]
Payments to acquire short-term investments	$ 9,200			$ 9,200

[1] As described in Note 2 to these Consolidated Financial Statements, we have restated the consolidated financial statements for the three months ended March 31, 2019