Additional amount of reimbursement and indemnification under debt instrument.

No definition available.

Name:	cphc_DebtInstrumentAdditionalReimbursementAndIndemnificationAmount
Namespace Prefix:	cphc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum amount of reimbursement and indemnification under debt instrument.

+ References

No definition available.

+ Details

Name:	cphc_DebtInstrumentMaximumReimbursementAndIndemnificationAmount
Namespace Prefix:	cphc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of impairment to other long-term receivables.

+ References

No definition available.

+ Details

Name:	cphc_ImpairmentToOtherLongtermReceivables
Namespace Prefix:	cphc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The price per race that has been guaranteed by the company to a third party company.

+ References

No definition available.

+ Details

Name:	cphc_OvernightRacingExpensePricePerRace
Namespace Prefix:	cphc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The average purse structure associated with the price of overnight races.

+ References

No definition available.

+ Details

Name:	cphc_OvernightRacingExpensesAveragePurseStructure
Namespace Prefix:	cphc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the additional purse monies provided for the potential overpayment of purses included in a purse fund contribution agreement.

+ References

No definition available.

+ Details

Name:	cphc_PurseFundContributionAgreementAdditionalPurseMoniesForPotentialOverpaymentOfPursesProvided
Namespace Prefix:	cphc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the additional purse monies guaranteed under a purse fund contribution agreement.

+ References

No definition available.

+ Details

Name:	cphc_PurseFundContributionAgreementAdditionalPurseMoniesGuaranteed
Namespace Prefix:	cphc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of overpayment receivable of purchase fund as of balance sheet date.

+ References

No definition available.

+ Details

Name:	cphc_PurseFundOverpaymentReceivable
Namespace Prefix:	cphc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount due from parties in nontrade transactions, classified as other.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-2

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 605
-Name Accounting Standards Codification
-Section 55
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477548/944-605-55-14

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 605
-Name Accounting Standards Codification
-Section 55
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477548/944-605-55-11

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 49
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-49

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(5)(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3)(a)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 7: 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)(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

Name:	us-gaap_OtherReceivables
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=cphc_IndemnityAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=cphc_DoranCanterburyIJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=cphc_DoranCanterburyIiMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 6 - Commitments and Contingencies 1 (Details Textual) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025	Dec. 30, 2025	Jan. 31, 2025	Dec. 31, 2024	Dec. 18, 2024	Dec. 21, 2023	Dec. 12, 2023	Oct. 27, 2022	Dec. 21, 2021
Overnight Racing Expense, Price Per Race									$ 23,000
Overnight Racing Expense, Price Per Race									$ 23,000
Other Receivables	$ 1,677,970	$ 1,677,970		$ 2,097,463			$ 1,597,463
Purse Fund Contribution Agreement, Additional Purse Monies Guaranteed						$ 500,000
Purse Fund Overpayment Receivable				$ 500,000
Purse Fund Contribution Agreement, Additional Purse Monies for Potential Overpayment of Purses Provided	2,097,463	2,097,463
Impairment to Other Long-term Receivables	419,493	419,493	$ 0
Indemnity Agreement [Member]
Debt Instrument, Maximum Reimbursement and Indemnification Amount	7,750,000	7,750,000										$ 5,000,000
Debt Instrument, Additional Reimbursement and Indemnification Amount					$ 250,000			$ 500,000		$ 1,300,000	$ 700,000
Indemnity Agreement [Member] \| Doran Canterbury I Joint Venture [Member]
Debt Instrument, Maximum Reimbursement and Indemnification Amount					7,750,000
Indemnity Agreement [Member] \| Doran Canterbury II [Member]
Debt Instrument, Maximum Reimbursement and Indemnification Amount	$ 2,750,000	$ 2,750,000			2,750,000			$ 1,000,000
Debt Instrument, Additional Reimbursement and Indemnification Amount					$ 1,750,000