CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (9,993)	$ (26,422)	$ (10,731)	$ (39,044)
Other comprehensive income (loss), net of nil tax:
Changes in fair value of available-for-sale securities	(20)	0	(20)	0
Foreign currency translation adjustments	(41)	276	(901)	283
Comprehensive loss	(10,054)	(26,146)	(11,652)	(38,761)
Deemed dividend related to warrant repricing	0	(184)	0	(184)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	210	76	763	(173)
Comprehensive loss attributable to IDEX common shareholders	$ (9,844)	$ (26,254)	$ (10,889)	$ (39,118)