SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Computation of Diluted Earnings (Loss) Per Common Share (Details)	3 Months Ended	9 Months Ended
Sep. 30, 2026 shares	Sep. 30, 2025 shares	Sep. 30, 2026 shares	Sep. 30, 2025 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from computation of net loss per common share (in shares)	179,046,091	84,744,599	203,756,356	84,744,599
Note conversion
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from computation of net loss per common share (in shares)	161,930,746	50,438,686	161,930,746	50,438,686
2030 Convertible Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, convertible debt, maximum conversion rate, number of shares (in shares)	0.2923976	0.2923976	0.2923976	0.2923976
2031 Convertible Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, convertible debt, maximum conversion rate, number of shares (in shares)	0.0857632	0.0857632	0.0857632	0.0857632
Google warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from computation of net loss per common share (in shares)	0	0	24,710,265	0
Unvested RSUs & PSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from computation of net loss per common share (in shares)	17,115,345	25,691,978	17,115,345	25,691,978
Public warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from computation of net loss per common share (in shares)	0	8,613,935	0	8,613,935

Antidilutive Securities Excluded From Computation Of Earnings Per Share, Convertible Debt, Maximum Conversion Ratio

No definition available.

Name:	cifr_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareConvertibleDebtMaximumConversionRatio
Namespace Prefix:	cifr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

+ Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- 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

+ Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=cifr_ConvertibleNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=cifr_ConvertibleNotes2030Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=cifr_ConvertibleNotes2031Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=cifr_GoogleWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=cifr_RestrictedStockUnitsRSUsAndPerformanceStockUnitsPSUsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=cifr_PublicWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: