CONDENSED CONSOLIDATED STATEMENT OF EQUITY (Unaudited) - USD ($) $ in Thousands		Total	Stock Issued for Converted Debt	Stock Issued for Warrant Exercises	At-The-Market Offering	Private Placement	Ideanomics Shareholders’ equity	Ideanomics Shareholders’ equity Stock Issued for Converted Debt	Ideanomics Shareholders’ equity Stock Issued for Warrant Exercises	Ideanomics Shareholders’ equity At-The-Market Offering	Ideanomics Shareholders’ equity Private Placement	Common Stock	Common Stock Stock Issued for Converted Debt	Common Stock Stock Issued for Warrant Exercises	Common Stock At-The-Market Offering	Common Stock Private Placement	Additional Paid-in  Capital	Additional Paid-in  Capital Stock Issued for Converted Debt	Additional Paid-in  Capital Stock Issued for Warrant Exercises	Additional Paid-in  Capital At-The-Market Offering	Additional Paid-in  Capital Private Placement	Retained Earnings/ (Accumulated Deficit)	Accumulated Other Comprehensive Loss	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2019												149,692,953
Beginning balance at Dec. 31, 2019		$ 58,737					$ 33,559					$ 150					$ 282,554					$ (248,481)	$ (664)	$ 25,178	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation		2,202					2,202										2,202
Common stock issuance for professional fees (in shares)												429,000
Common stock issuance for professional fee		240					240										240
Common stock issuance for convertible notes (in shares)												1,454,424
Common stock issuance for convertible note		614					614					$ 1					613
Common stock issuance for acquisition (in shares)												10,883,668
Common stock issuance for acquisition		6,748					6,748					$ 11					6,737
Common stock issuance (in shares)												1,000,000,000
Common stock issuance		1,000					1,000					$ 1					999
Measurement period adjustment		(11,454)																						(11,454)	[1]
Non-controlling shareholder contribution		100																						100	[1]
Net income (loss)		(12,726)					(12,348)															(12,348)		(378)	[1]
Foreign currency translation adjustments, net of nil tax		7					(16)																(16)	23	[1]
Ending balance (in shares) at Mar. 31, 2020												163,460,045
Ending balance at Mar. 31, 2020		45,468					31,999					$ 163					293,345					(260,829)	(680)	13,469	[1]
Beginning balance (in shares) at Dec. 31, 2019												149,692,953
Beginning balance at Dec. 31, 2019		58,737					33,559					$ 150					282,554					(248,481)	(664)	25,178	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuance (in shares)																34,500,000
Changes in fair value of available-for-sale securities		0
Foreign currency translation adjustments, net of nil tax		283
Ending balance (in shares) at Jun. 30, 2020												237,008,159
Ending balance at Jun. 30, 2020		83,351					70,042					$ 237					357,720					(287,407)	(508)	13,309	[1]
Beginning balance (in shares) at Mar. 31, 2020												163,460,045
Beginning balance at Mar. 31, 2020		45,468					31,999					$ 163					293,345					(260,829)	(680)	13,469	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation		3,394					3,394										3,394
Common stock issuance for professional fees (in shares)												515,942
Common stock issuance for professional fee		309					309					$ 1					308							0	[1]
Common stock issuance for convertible notes (in shares)													26,231,634	6,995,906
Common stock issuance for convertible note			$ 20,009	$ 5,628				$ 20,009	$ 5,628				$ 26	$ 7				$ 19,983	$ 5,621
Common stock issued to settle debt (in shares)												4,577,876
Common stock issued to settle debt		2,314					2,314					$ 5					2,309
Common stock issuance for acquisition (in shares)												459,180
Common stock issuance for acquisition		293					293										293
Common stock issuance (in shares)																34,500,000
Common stock issuance		32,502					32,502					$ 35					32,467
Measurement period adjustment		(131)																						(131)	[1]
Changes in fair value of available-for-sale securities		0
Common stock issued under employee stock incentive plan (in shares)												293,857
Net income (loss)	[2]	(26,711)					(26,578)															(26,578)		(133)	[1]
Foreign currency translation adjustments, net of nil tax		276					172																172	104	[1]
Ending balance (in shares) at Jun. 30, 2020												237,008,159
Ending balance at Jun. 30, 2020		83,351					70,042					$ 237					357,720					(287,407)	(508)	13,309	[1]
Beginning balance (in shares) at Dec. 31, 2020												344,861,295
Beginning balance at Dec. 31, 2020		193,022					186,584					$ 345					531,866					(346,883)	1,256	6,438	[3]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation		2,040					2,040										2,040
Common stock issuance for professional fees (in shares)												440,909
Common stock issuance for professional fee		1,162					1,162										1,162
Common stock issuance for convertible notes (in shares)												45,895,763
Common stock issuance for convertible note		140,126					140,126					$ 46					140,080
Common stock issuance for acquisition (in shares)												10,181,299
Common stock issuance for acquisition		32,377					32,377					$ 10					32,367
Common stock issuance (in shares)												17,615,534
Common stock issuance		53,407					53,407					$ 18					53,389
Common stock issued under employee stock incentive plan (in shares)												475,000
Common stock issued under employee stock incentive plan		251					251										251
Net income (loss)		(854)					(574)															(574)		(280)	[3]
Foreign currency translation adjustments, net of nil tax		(860)					(472)																(472)	(388)	[3]
Ending balance (in shares) at Mar. 31, 2021												419,469,800
Ending balance at Mar. 31, 2021		420,671					414,901					$ 419					761,155					(347,457)	784	5,770	[3]
Beginning balance (in shares) at Dec. 31, 2020												344,861,295
Beginning balance at Dec. 31, 2020		193,022					186,584					$ 345					531,866					(346,883)	1,256	6,438	[3]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuance (in shares)																10,000,000.0
Common stock issuance																$ 27,300
Changes in fair value of available-for-sale securities		(20)
Foreign currency translation adjustments, net of nil tax		(901)
Ending balance (in shares) at Jun. 30, 2021												466,354,487
Ending balance at Jun. 30, 2021		543,680					538,236					$ 466					894,285					(357,245)	730	5,444	[3]
Beginning balance (in shares) at Mar. 31, 2021												419,469,800
Beginning balance at Mar. 31, 2021		420,671					414,901					$ 419					761,155					(347,457)	784	5,770	[3]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation		2,007					2,007										2,007
Common stock issuance for professional fees (in shares)												260,000
Common stock issuance for professional fee		656					656										656
Common stock issuance for acquisition (in shares)												6,733,497
Common stock issuance for acquisition		21,127					21,127					$ 7					21,120
Common stock issuance (in shares)												34,473,719			25,301,190	10,000,000
Common stock issuance					$ 74,347	$ 27,300				$ 74,347	$ 27,300				$ 25	$ 10				$ 74,322	$ 27,290
Changes in fair value of available-for-sale securities		(20)					(20)																(20)
Common stock issued under employee stock incentive plan (in shares)												4,590,000
Common stock issued under employee stock incentive plan		7,740					7,740					$ 5					7,735
Net income (loss)		(10,107)					(9,788)															(9,788)		(319)	[3]
Foreign currency translation adjustments, net of nil tax		(41)					(34)																(34)	(7)	[3]
Ending balance (in shares) at Jun. 30, 2021												466,354,487
Ending balance at Jun. 30, 2021		$ 543,680					$ 538,236					$ 466					$ 894,285					$ (357,245)	$ 730	$ 5,444	[3]

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

[2] Excludes deemed dividend related to warrant repricing

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