Name:	abcp_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsPercentOfMarketValueOfCommonStock
Namespace Prefix:	abcp_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	instant

Percentage of securities that would be issuable upon the exercise of warrants or rights.

No definition available.

Name:	abcp_ClassOfWarrantOrRightPercentOfSecuritiesThatWouldBeIssuableUponExerciseOfWarrantsOrRights
Namespace Prefix:	abcp_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	instant

The number of rights per common share related to dividends declared.

No definition available.

Name:	abcp_DividendsDeclaredNumberOfRightsPerCommonShare
Namespace Prefix:	abcp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The minimum percentage of common shares by a single acquirer or group, or the occurrence of certain Triggering Events related to redemption of rights per common share related to dividends declared.

No definition available.

Name:	abcp_MinimumPercentageOfCommonSharesBySingleAcquirerOrGroup
Namespace Prefix:	abcp_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	instant

The minimum percentage of outstanding common shares for tender offer in relation to dividend declaration.

No definition available.

Name:	abcp_MinimumPercentageOfOutstandingCommonSharesForTenderOffer
Namespace Prefix:	abcp_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	instant

The shareholder's minimum percentage of outstanding common shares to be acquired or upon the commencement or disclosure of an intention to commence a tender offer or exchange offer for 20% or more of the common shares.

No definition available.

Name:	abcp_MinimumPercentageOfOutstandingCommonSharesToBeAcquired
Namespace Prefix:	abcp_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	instant

Number of directors who are owning and controlling an affiliated entity.

No definition available.

Name:	abcp_NumberOfDirectors
Namespace Prefix:	abcp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Period after accumulation of minimum percentage of common shares to invoke redemption of rights, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	abcp_PeriodAfterAccumulationOfMinimumPercentageOfCommonSharesToInvokeRedemptionOfRights
Namespace Prefix:	abcp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The redemption price of rights per common share related to dividends declared.

No definition available.

Name:	abcp_RedemptionPriceOfRights
Namespace Prefix:	abcp_
Data Type:	dtr:perShareItemType
Balance Type:	na
Period Type:	instant

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

No definition available.

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Face amount or stated value per share of common stock.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.