Represents amount of assets sold under agreements carrying amount.

No definition available.

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- Definition

Represents amount of assets sold under agreements to fair value.

+ References

No definition available.

+ Details

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- Definition

Represents Value of input used to measure of digital Asset.

+ References

No definition available.

+ Details

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- Definition

It represents the expected holding period of GTB.

+ References

No definition available.

+ Details

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- Definition

Number of GTB received for services provided to GTD.

+ References

No definition available.

+ Details

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- Definition

Represents the number of orders procured during the period.

+ References

No definition available.

+ Details

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- Definition

Percentage of discount to fixed contract price.

+ References

No definition available.

+ Details

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- Definition

It represents percentage of marketing and business development management services.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

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Balance Type:	credit
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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 220
-Section S99
-Paragraph 1
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-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

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Data Type:	na
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Period Type:

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Name:	us-gaap_TypeOfArrangementAxis=idex_GtDollarPtdLtdMember
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Revenue - Additional Information (Details)		3 Months Ended		9 Months Ended
Revenue - Additional Information (Details)	Mar. 14, 2019 USD ($) item	Sep. 30, 2019 USD ($) item	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2019	Mar. 31, 2019 USD ($) item
Disaggregation of Revenue [Line Items]
Revenue from related party		$ 2,854,178	$ 0	$ 43,554,178	$ 0
Revenue		3,103,690	43,707,937	$ 44,503,562	362,628,296
Qianxi [Member] \| Joint Venture [Member]
Disaggregation of Revenue [Line Items]
Revenue from related party		$ 2,900,000
IUnicorn, Also Known as Shenma Zhuanche [Member] \| Joint Venture [Member]
Disaggregation of Revenue [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent						50.01%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners						49.99%
Number of Orders \| item		4,172
GTBs
Disaggregation of Revenue [Line Items]
Percentage of marketing and business development management services				0.25%
GTD
Disaggregation of Revenue [Line Items]
Number of GTB received for services provided to GTD \| item							1,250,000
Assets sold under agreements carrying amount							$ 20,400,000
GTD \| Digital asset management services
Disaggregation of Revenue [Line Items]
Number of GTB received for services provided to GTD \| item	7,083,333
Percentage of marketing and business development management services	0.25%
Percentage of discount to fixed contract price	76.00%
GTD \| Digital asset management services \| Expected term [Member]
Disaggregation of Revenue [Line Items]
Expecting holding period				3 years
GTD \| Digital asset management services \| Expected volatility [Member]
Disaggregation of Revenue [Line Items]
Digital asset (liability) net, measurement input		155		155
GTD \| Digital asset management services \| Expected dividend yield [Member]
Disaggregation of Revenue [Line Items]
Digital asset (liability) net, measurement input		0		0
GTD \| Digital asset management services \| Risk free interest rate [Member]
Disaggregation of Revenue [Line Items]
Digital asset (liability) net, measurement input		2.25		2.25
GTD \| Digital asset management services \| Level II
Disaggregation of Revenue [Line Items]
Number of GTB received for services provided to GTD \| item	7,083,333
Assets sold under agreements fair value	$ 40,700,000
Percentage of discount to fixed contract price	76.00%
Mobile Energy Group, Formerly We Cast Services [Member]
Disaggregation of Revenue [Line Items]
Revenue		$ 3,103,690	43,707,937	$ 44,503,562	362,628,296
Mobile Energy Group, Formerly We Cast Services [Member] \| Digital asset management services
Disaggregation of Revenue [Line Items]
Revenue		0	0	40,700,000	0
Mobile Energy Group, Formerly We Cast Services [Member] \| Electric Vehicles [Member]
Disaggregation of Revenue [Line Items]
Revenue		$ 2,854,178	$ 0	2,854,178	0
Legacy YOD
Disaggregation of Revenue [Line Items]
Revenue				$ 0	$ 0