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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($)
$ in Thousands

3 Months Ended

6 Months Ended

12 Months Ended

Jun. 30, 2023

Jun. 30, 2023

Dec. 31, 2022

Concentration Risk [Line Items]

USDC held

$ 315,508

$ 315,508

$ 861,149

Customer crypto assets

^[1]

124,243,587

124,243,587

75,413,188

Customer crypto liabilities

^[2]

$ 124,243,587

$ 124,243,587

$ 75,413,188

Accounts Receivable | Customer Concentration Risk | One Customer

Concentration Risk [Line Items]

Concentration risk, percentage (more than)

10.00%

10.00%

Revenue Benchmark | Customer Concentration Risk | One Customer

Concentration Risk [Line Items]

Concentration risk, percentage (more than)

10.00%

10.00%

[1]	Safeguarding assets
[2]	Safeguarding liabilities

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- Definition

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+ References

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- Definition

Fair value of asset to safeguard crypto-asset held for platform user.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section FF
-Subsection Q1
-Publisher SEC

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 954
-SubTopic 310
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
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