Note 2 - Summary of Accounting Policies (Detail) - Consolidated Variable Interest Entities - Income Statement Data (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues	$ 107,821	$ 55,792	$ 59,419
Gross profit	19,625	12,005	11,544
Net income	$ 3,622	$ 1,959	$ 1,373

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