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COMPUTE NORTH BANKRUPTCY (Details Narrative) - USD ($) $ in Thousands			9 Months Ended	12 Months Ended
	Sep. 22, 2022	Feb. 03, 2022	Sep. 30, 2022	Dec. 31, 2022	Feb. 16, 2023
Impairment charges			$ 39,000	$ 55,674
Unsecured debt					$ 40,000
Computer North LLC [Member] | Unsecured Senior Promissory Note [Member]
Bankruptcy claims amount of claims siled	$ 21,000
King Mountain And Wolf Hollow [Member]
Bankruptcy claims amount of claims siled	50,000
Convertible Preferred Stock [Member] | Computer North Holdings, Inc. [Member]
Bankruptcy claims amount of claims siled	$ 10,000	$ 10,000

X

- Definition

Impairment charge.

+ References

No definition available.

+ Details

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Namespace Prefix:	MARA_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of bankruptcy claim filed with bankruptcy court.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481404/852-10-50-2

+ Details

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Period Type:	duration

X

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

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