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Note C - Summary of Significant Accounting Policies (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Allowance for Doubtful Accounts Receivable | $ 10,000 | $ 10,000
Inventory Valuation Reserves | 220,000 | 0
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment | 721,619 | 659,144
Impairment of Long-Lived Assets Held-for-use | 0 | 0
Shipping, Handling and Transportation Costs | 0 | 0
Income from Non-employee Options | $ 9,384 |
Share-based Goods and Nonemployee Services Transaction, Capitalized Cost |  | $ 25,346
Options and Warrants [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 3,679,152 | 3,329,769
Minimum [Member] |  |
Property, Plant and Equipment, Useful Life | 2 years |
Maximum [Member] |  |
Property, Plant and Equipment, Useful Life | 7 years |
Milestone China [Member] |  |
Variable Interest Entity Majority Shareholder Ownership Percentage | 53.00% |
Equity Method Investment, Deferred Intercompany Profit (Loss), Percentage | 40.00% |

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