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Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) - Trader Barter Revenue and Expense Recognized (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Principal Transaction Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net trade barter income (loss) | $ 5,201 | $ 7,073 | $ 5,144 | $ 870 | $ (2,109) | $ 15,873 | $ 10,994 | $ 3,371 | $ 18,288 | $ 28,129 | $ 9,035
Advertising Barter Transactions [Member] |  |  |  |  |  |  |  |  |  |  |
Principal Transaction Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Trade barter revenue |  |  |  |  |  |  |  |  | 1,390 | 1,248 | 1,529
Trade barter expense |  |  |  |  |  |  |  |  | (1,262) | (1,267) | (1,421)
Net trade barter income (loss) |  |  |  |  |  |  |  |  | $ 128 | $ (19) | $ 108

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