Note 1 - The Company (Details Textual)	Sep. 30, 2023
San Pedro Sula, Honduras [Member]
Employees Covered Under Collective Bargaining Agreement	2,300

Represents the number of employees covered under a collective bargaining agreement.

No definition available.

Name:	dla_EmployeesCoveredUnderCollectiveBargainingAgreement
Namespace Prefix:	dla_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant