Note 2 - Accounting Policies (Detail) - Financial Data for Variable Interest Entities - Income Statement (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Revenue	$ 19,272	$ 17,252
Gross profit	3,751	2,854
Net income	$ 1,056	$ 633

Amount of the consolidated Variable Interest Entity's gross profit included in the reporting entity's statement of financial position.

No definition available.

Name:	aegn_VariableInterestEntitiesSummarizedFinancialInformationGrossProfitLoss
Namespace Prefix:	aegn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration