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Note 1 - Trader Barter Revenue and Expense Recognized (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Advertising Barter Transactions [Member] |  |  |
Trade revenue | $ 2,299,000 | $ 2,174,000 | $ 1,390,000
Trade expense | (2,188,000) | (2,287,000) | (1,262,000)
Net trade income (loss) | 111,000 | (113,000) | 128,000
Net trade income (loss) | $ 39,301,000 | $ 48,061,000 | $ 18,288,000

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