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Accounting Policies - Accounting Policies (Detail Narrative) | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Foreign currency transaction gains (losses) during period | $ 24,404 | $ (75,041)
Allowance for doubtful accounts | $ 166,907 | 152,357
Weighted average intangible assets amortization period | 10 years |
Research and development costs during period | $ 752,000 | 750,000
Shipping costs during period | 6,595,544 | 5,388,481
Advertising costs during period | $ 1,997,113 | $ 1,934,250
Major Customer No. 1 |  |
Net sales to major customers | 16.00% | 14.00%
Major Customer No. 2 |  |
Net sales to major customers | 11.00% | 11.00%
Exceeded 10% of Consolidated Net Sales |  |
Number of major customers | 2 | 2
Minimum Range |  |
Asset useful life | 3 years |
Maximum Range |  |
Asset useful life | 30 years |

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