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Note 2 - Accounting Policies (Details) - Financial Data for Variable Interest Entities - Income Statement (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Financial Data for Variable Interest Entities - Income Statement [Abstract]      
Revenue $ 84,968aegn_VariableInterestEntitiesSummarizedFinancialInformationRevenue $ 85,908aegn_VariableInterestEntitiesSummarizedFinancialInformationRevenue $ 107,821aegn_VariableInterestEntitiesSummarizedFinancialInformationRevenue
Gross profit 14,306aegn_VariableInterestEntitiesSummarizedFinancialInformationGrossProfitLoss 12,998aegn_VariableInterestEntitiesSummarizedFinancialInformationGrossProfitLoss 19,625aegn_VariableInterestEntitiesSummarizedFinancialInformationGrossProfitLoss
Net income $ 2,413aegn_VariableInterestEntitiesSummarizedFinancialInformationNetIncomeLoss $ 1,892aegn_VariableInterestEntitiesSummarizedFinancialInformationNetIncomeLoss $ 3,622aegn_VariableInterestEntitiesSummarizedFinancialInformationNetIncomeLoss