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Note 9 - Equity Method Investment (Details) - TEL’s Summarized Financial Information - Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
TEL’s Summarized Financial Information - Balance Sheets [Abstract]
Current Assets	$ 9,748us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	$ 14,525us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets
Non-current Assets	80,984us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	64,731us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets
Current Liabilities	5,329us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	16,733us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities
Non-current Liabilities	65,794us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities	45,687us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities
Total Equity	$ 19,609us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity	$ 16,836us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity

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