CONSOLIDATED STATEMENTS OF EQUITY - USD ($)		Series E Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Ideanomics Shareholders' equity	Non - controlling Interest	[1]	Total
Balance at Dec. 31, 2018		$ 0	$ 103,000	$ 195,780,000	$ (149,975,000)	$ (1,665,000)	$ 44,243,000	$ (1,031,000)		$ 43,212,000
Balance (in shares) at Dec. 31, 2018		0	102,766,006
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation		$ 0	$ 0	9,113,000	0	0	9,113,000	0		9,113,000
Common stock issued under employee stock incentive plan		0	$ 0	0	0	0	0	0		0
Common stock issued under employee stock incentive plan (in shares)			129,840
Common stock issuance for acquisitions, investments, and assets		0	$ 38,000	53,183,000	0	0	53,221,000	24,598,000		77,819,000
Common stock issuance for acquisitions, investments, and assets (in shares)			37,966,908
Disposal of subsidiary		0	$ 0	1,374,000	0	586,000	1,960,000	446,000		2,406,000
Common stock issuance for convertible notes		$ 0	$ 8,000	22,997,000	0	0	23,005,000	0		23,005,000
Common stock issuance for convertible notes (in shares)		0	8,186,890
Non-controlling shareholder contribution		$ 0	$ 1,000	(1,000)	0	0	0	321,000		321,000
Non-controlling shareholder contribution (in shares)			575,431
Common stock issued to settle debt		0	$ 0	110,000	0	0	110,000	0		110,000
Common stock issued to settle debt (in shares)			67,878
Net loss	[2]	0	$ 0	0	(98,508,000)	0	(98,508,000)	852,000		(97,656,000)
Foreign currency translation adjustments, net of nil tax		0	0	0	0	415,000	415,000	(8,000)		407,000
Balance at Dec. 31, 2019		$ 0	$ 150,000	282,556,000	(248,483,000)	(664,000)	33,559,000	25,178,000		58,737,000
Balance (in shares) at Dec. 31, 2019		0	149,692,953
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation		$ 0	$ 0	11,971,000	0	0	11,971,000	0		11,971,000
Common stock issued under employee stock incentive plan		0	$ 3,000	1,723,000	0	0	1,726,000	0		1,726,000
Common stock issued under employee stock incentive plan (in shares)			2,634,666
Common stock issuance for professional fees		0	$ 2,000	1,640,000	0	0	1,642,000	0		1,642,000
Common stock issuance for professional fees (in shares)			1,804,033
Common stock issuance for warrant exercise		0	$ 9,000	7,206,000	0	0	7,215,000	0		7,215,000
Common stock issuance for warrant exercise (in shares)			8,995,906
Common stock issuance for acquisitions, investments, and assets		0	$ 13,000	8,179,000	0	0	8,192,000	0		8,192,000
Common stock issuance for acquisitions, investments, and assets (in shares)			13,056,055
Common stock issuance for convertible notes		$ 0	$ 40,000	45,627,000	0	0	45,667,000	0		45,667,000
Common stock issuance for convertible notes (in shares)		0	40,662,420
Extinguishment of convertible note		$ 0	$ 0	(12,000,000)	0	0	(12,000,000)	0		(12,000,000)
Common stock issuance		0	$ 123,000	182,655,000	0	0	182,778,000	(280,000)		182,498,000
Common stock issuance (in shares)			123,437,386
Measurement period adjustment		0	$ 0	0	0	0	0	(11,584,000)		(11,584,000)
Non-controlling shareholder contribution		0	$ 0	0	0	0	0	100,000		100,000
Non-controlling shareholder contribution (in shares)			0
Common stock issued to settle debt		0	$ 5,000	2,309,000	0	0	2,314,000	0		2,314,000
Common stock issued to settle debt (in shares)			4,577,876
Net loss	[2]	0	$ 0	0	(98,400,000)	0	(98,400,000)	(8,264,000)		(106,664,000)
Foreign currency translation adjustments, net of nil tax		0	0	0	0	1,920,000	1,920,000	1,288,000		3,208,000
Balance at Dec. 31, 2020		$ 0	$ 345,000	$ 531,866,000	$ (346,883,000)	$ 1,256,000	$ 186,584,000	$ 6,438,000		$ 193,022,000
Balance (in shares) at Dec. 31, 2020		0	344,861,295

[1] Excludes accretion of dividend for redeemable non-controlling interest

[2] Excludes deemed dividend related to warrant repricing