SEGMENT AND GEOGRAPHICAL INFORMATION - Summary of Geographic information (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Mar. 19, 2019	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Revenues:
Revenues	$ 1,789	$ 144,901	$ 118,452	$ 304,345	$ 117,094
Property and equipment, net:
Property and equipment, net	18,781			18,781	18,781	$ 22,741
U.S. [Member]
Revenues:
Revenues	1,185	8,541	6,008	17,824	9,312
Property and equipment, net:
Property and equipment, net	7,321			7,321	7,321	9,965
Not connected to a country [Member]
Revenues:
Revenues	136	131,133	106,886	273,988	101,910
Property and equipment, net:
Property and equipment, net	6,739			6,739	6,739	6,826
Other [Member]
Revenues:
Revenues	468	$ 5,227	$ 5,558	12,533	5,872
Property and equipment, net:
Property and equipment, net	$ 4,721			$ 4,721	$ 4,721	$ 5,950