Maximum borrowing capacity under the debt agreement.

No definition available.

Name:	clpr_DebtAgreementMaximumBorrowingCapacity
Namespace Prefix:	clpr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The period in which the payments on the loan are interest-only.

+ References

No definition available.

+ Details

Name:	clpr_DebtInstrumentInterestOnlyPaymentsPeriod
Namespace Prefix:	clpr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeBasisSpreadOnVariableRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Note 7 - Notes Payable (Details Textual) - USD ($) $ in Thousands				12 Months Ended	60 Months Ended	132 Months Ended
	Dec. 06, 2018	Feb. 21, 2018	May 09, 2017	Dec. 31, 2018	Nov. 01, 2027	Jul. 31, 2028	Jun. 30, 2028	Dec. 31, 2017	Oct. 27, 2017	Jun. 27, 2016	May 11, 2016
Long-term Debt, Gross				$ 925,613				$ 855,116
Secured First Mortgage Loan [Member] \| New York Community Bank [Member]
Long-term Debt, Gross		$ 246,000
Debt Instrument, Interest Rate, Stated Percentage		3.50%
Debt Instrument, Interest Only Payments Period		2 years 180 days
Secured First Mortgage Loan [Member] \| New York Community Bank [Member] \| Prime Rate [Member]
Derivative, Basis Spread on Variable Rate		2.75%
Secured First Mortgage Loan [Member] \| Citibank NA [Member]
Long-term Debt, Gross	$ 75,000
Debt Instrument, Term	18 years
Secured First Mortgage Loan [Member] \| Citibank NA [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Interest Rate, Stated Percentage				4.70%
Derivative, Basis Spread on Variable Rate	2.15%
Mortgages 2 [Member] \| New York Community Bank [Member] \| 141 Livingston Street, Brooklyn [Member]
Debt Instrument, Interest Rate, Stated Percentage											3.875%
Mortgages 2 [Member] \| New York Community Bank [Member] \| 141 Livingston Street, Brooklyn [Member] \| Scenario, Forecast [Member]
Debt Instrument, Periodic Payment, Total							$ 374
Refinanced Loans [Member] \| DB and SL Green Finance [Member] \| Tribeca House Properties [Member]
Long-term Debt, Gross		$ 410,000
Fixed Interest Rate Financing [Member]
Long-term Debt, Gross		$ 360,000
Debt Instrument, Interest Rate, Stated Percentage		4.506%
Mortgages [Member] \| New York Community Bank [Member] \| Property at 10 W 65th St. Manhattan, NY [Member]
Long-term Debt, Gross									$ 34,350
Debt Instrument, Interest Rate, Stated Percentage									3.375%
Mortgages [Member] \| New York Community Bank [Member] \| Prime Rate [Member] \| Property at 10 W 65th St. Manhattan, NY [Member] \| Scenario, Forecast [Member]
Debt Instrument, Basis Spread on Variable Rate					2.75%
Mortgages [Member] \| Capital One Multifamily Finance LLC [Member] \| Aspen [Member]
Long-term Debt, Gross										$ 70,000
Debt Instrument, Interest Rate, Stated Percentage										3.68%
Mortgages [Member] \| Capital One Multifamily Finance LLC [Member] \| Aspen [Member] \| Scenario, Forecast [Member]
Debt Instrument, Periodic Payment, Total						$ 321
Mortgages [Member] \| Blackstone Real Estate Special Situations Advisors LLC [Member] \| 107 Columbia Heights in Brooklyn, NY [Member]
Long-term Debt, Gross			$ 59,000
Mortgages [Member] \| Blackstone Real Estate Special Situations Advisors LLC [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| 107 Columbia Heights in Brooklyn, NY [Member]
Debt Instrument, Basis Spread on Variable Rate			3.85%
Debt Instrument, Interest Rate, Effective Percentage				6.40%
Construction Loans [Member]
Long-term Debt, Gross			$ 14,700
Construction Loans [Member] \| Blackstone Real Estate Special Situations Advisors LLC [Member] \| 107 Columbia Heights in Brooklyn, NY [Member]
Debt Agreement Maximum Borrowing Capacity			$ 14,700
Proceeds from Issuance of Long-term Debt, Total				$ 5,731