The Additional litigation funding amount yet to be received.

No definition available.

Name:	abcp_AdditionalLitigationFundingAmountYetToBeReceived
Namespace Prefix:	abcp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Multiplier applied to the litigation funding amount so that the litigation funder would receive back their initial funding amount, if the litigation proceeds are received between 12 and 24 months.

+ References

No definition available.

+ Details

Name:	abcp_MultiplierLitigationFundingAmountOne
Namespace Prefix:	abcp_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of additional proceeds distribution based on the aggregate Litigation Fund Amount,

+ References

No definition available.

+ Details

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Namespace Prefix:	abcp_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Refers to percentage of financial distribution on additional amounts (above 7,500,000) to the entity pursuant to Litigation Funding Agreement 2017.

+ References

No definition available.

+ Details

Name:	abcp_PercentageOfLitigationProceedsAdditionalAmounts
Namespace Prefix:	abcp_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of remaining litigation proceeds in excess of the Preliminary Company Preference Amount for allocation under the litigation funding agreement.

+ References

No definition available.

+ Details

Name:	abcp_PercentageOfRemainingLitigationProceedsAbovePreliminaryCompanyPreferenceAmount
Namespace Prefix:	abcp_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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-Topic 470
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+ Details

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

- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount or range of possible amounts of gain that could be realized upon the resolution of a contingency.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483049/450-30-50-1

+ Details

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

- Definition

Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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+ Details

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

- Definition

Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (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
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maturity date of long-term debt, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	instant

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
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+ Details

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

- Definition

The cash inflow from a long-term borrowing made from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from Advances from Affiliates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_GainContingenciesByNatureAxis=us-gaap_PositiveOutcomeOfLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=abcp_InvestmentIn111West57ThPartnersLlcMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_ChiefExecutiveOfficerMember
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Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=abcp_LitigationFundingAgreement2026Member
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Period Type:

- Details

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Litigation Funding Agreement(s) - 2026 (Details) - USD ($)	1 Months Ended			3 Months Ended	12 Months Ended
	Mar. 31, 2026	Feb. 28, 2026	Jan. 31, 2026	Mar. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Mar. 02, 2026
Positive Outcome of Litigation [Member] \| Amendment [Member]
Litigation Funding Agreement [Abstract]
Percentage of Remaining Litigation Proceeds Above Preliminary Company Preference Amount					75.00%
Percentage of aggregate Litigation Fund Amount					50.00%
RAB [Member]
Litigation Funding Agreement [Abstract]
Proceeds from loans, related party				$ 350,000	$ 2,100,000	$ 1,850,000
Notes payable					$ 3,600,000	1,500,000
RAB [Member] \| RAB Promissory Notes [Member]
Litigation Funding Agreement [Abstract]
Maturity date					Mar. 31, 2029
RAB [Member] \| Positive Outcome of Litigation [Member] \| RAB Promissory Notes [Member]
Litigation Funding Agreement [Abstract]
Gain contingency, unrecorded amount					$ 7,500,000
RAB [Member] \| Positive Outcome of Litigation [Member] \| Amendment [Member] \| RAB Promissory Notes [Member]
Litigation Funding Agreement [Abstract]
Percentage Of Litigation Proceeds Additional Amounts					25.00%
BARC Investments, LLC [Member]
Litigation Funding Agreement [Abstract]
Accrued interest					$ 200,000
Maturity date					Mar. 31, 2029
Proceeds from loans, related party					$ 0	2,000,000
Notes payable					2,000,000	$ 2,000,000
Debt instrument converted principal amount					$ 2,000,000
Subsequent Event [Member] \| RAB [Member]
Litigation Funding Agreement [Abstract]
Proceeds from loans, related party		$ 300,000	$ 100,000
Subsequent Event [Member] \| RAB [Member] \| RAB Promissory Notes [Member]
Litigation Funding Agreement [Abstract]
Debt Instrument, Unused Borrowing Capacity, Amount							$ 6,000,000
Aggregate principal amount							4,000,000
Accrued interest							$ 219,000
Proceeds from loans, related party	$ 1,000,000
Additional litigation funding amount yet to be received	$ 1,000,000
Minimum [Member]
Litigation Funding Agreement [Abstract]
Multiplier Litigation Funding Amount One					1.5
Maximum [Member]
Litigation Funding Agreement [Abstract]
Multiplier Litigation Funding Amount One					1.8