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Note 2 - Significant Accounting Policies (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Foreign Currency Transaction Gain (Loss), Realized | $ 30,000 | $ 19,000 | $ 24,000
Weighted Average Number Diluted Shares Outstanding Adjustment | 19,169 | 90,085 | 68,400
Goodwill, Impairment Loss | $ 0 | $ 0 | $ 0
Goodwill, Foreign Currency Translation Gain (Loss) | 6,748 | 2,845 |
Amortization of Intangible Assets | $ 1,618 | $ 6,442 | $ 40,744
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 180 days |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 0 | 0 | 0
Allocated Share-based Compensation Expense | $ 0 | $ 0 | $ 0
Shipping, Handling and Transportation Costs | 1,965,000 | 1,982,000 | 2,012,000
Capitalized Catalog, Costs | 203,000 | 213,000 |
Advertising Expense | $ 4,956,000 | $ 4,759,000 | $ 4,826,000
Restricted Stock [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 300,000 |  |
Trademarks [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life | 15 years |  |
Copyrights [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life | 15 years |  |
Minimum [Member] |  |  |
Capitalized Catalog, Useful Life | 12 years |  |
Maximum [Member] |  |  |
Capitalized Catalog, Useful Life | 18 years |  |
Machinery and Equipment [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |
Machinery and Equipment [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 10 years |  |
Furniture and Fixtures [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 7 years |  |
Furniture and Fixtures [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 15 years |  |
Vehicles [Member] |  |  |
Property, Plant and Equipment, Useful Life | 5 years |  |
Building and Building Improvements [Member] |  |  |
Property, Plant and Equipment, Useful Life | 40 years |  |

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