CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (16,414)	$ (3,329)	$ (23,921)	$ (32,864)
Other comprehensive loss, net of taxes, as appropriate:
Foreign currency translation adjustments	772	(1,028)	(1,743)	(998)
Comprehensive net income (loss)	(15,642)	(4,357)	(25,664)	(33,862)
Comprehensive income attributable to noncontrolling interest	(144)	(394)	(119)	(841)
Comprehensive net loss attributable to ION	$ (15,786)	$ (4,751)	$ (25,783)	$ (34,703)