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Transactions with Related Parties (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Transactions with Related Parties [Abstract]
Percentage of annual management fee paid equal to gross equity			1.50%
Management Fees and Compensation Reimbursement to Manager [Abstract]
Management fees	$ 0	$ 1,610	$ 0	$ 3,208
Compensation reimbursement	0	150	0	300
Total	$ 0	$ 1,760	$ 0	$ 3,508

X

- Definition

Represents the amount of compensation reimbursement on expenses incurred.

+ References

No definition available.

+ Details

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X

- Definition

The total amount of management fee and expense reimbursement to affiliate.

+ References

No definition available.

+ Details

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- References

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- Definition

Percentage of annual management fee paid equal to gross equity.

+ References

No definition available.

+ Details

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Namespace Prefix:	chmi_
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- Definition

Amount of expense for investment management fee, including, but not limited to, expense in connection with research, selection, supervision, and custody of investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 946
-SubTopic 830
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479168/946-830-55-10

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479105/946-220-45-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
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-Publisher FASB
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 50
-Paragraph 1
-SubTopic 10
-Topic 850
-Publisher FASB
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- References

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