BUSINESS AND ORGANIZATION - Commercial Loans and Investments (Details)	Sep. 30, 2026 property
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of properties acquired as a sale-leaseback transaction	4

The number of real estate properties purchased as a sale and leaseback transaction as of the balance sheet date.

No definition available.

Name:	pine_NumberOfRealEstatePropertiesPurchasedAsSaleAndLeasebackTransaction
Namespace Prefix:	pine_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant