CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (PARENTHETICALS) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Grants participations excluded from research and development costs	$ 1,051	$ 2,855	$ 3,674

Grants participations excluded from research and development costs.

No definition available.

Name:	allt_GrantsParticipationsExcludedFromResearchAndDevelopmentCosts
Namespace Prefix:	allt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration