Label	Element	Value
Noncontrolling Interest [Member]
Noncontrolling Interest Increase From Contributions From Noncontrolling Interest	alco_NoncontrollingInterestIncreaseFromContributionsFromNoncontrollingInterest	$ 440,000

Noncontrolling Interest Increase From Contributions From Noncontrolling Interest

No definition available.

Name:	alco_NoncontrollingInterestIncreaseFromContributionsFromNoncontrollingInterest
Namespace Prefix:	alco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration