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Note D- Concentration of Risk (Details Textual) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015
Cash, Uninsured Amount | $ 811,000 | $ 4,073,000
Accounts Receivable, Net | 3,133,246 | 3,391,405
Allowance for Doubtful Accounts Receivable, Noncurrent | $ 500,000 |
Percentage of Remaining Balance Owned Reserved | 24.00% |
Customer C [Member] |  |
Accounts Receivable, Net | $ 2,070,000 |
Allowance for Doubtful Accounts Receivable, Noncurrent | $ 500,000 |
Percentage of Remaining Balance Owned Reserved | 24.00% |

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