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Note A - The Company and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] |
|  | December 31, |
|  | 2016 |  |  | 2015 |
Accounts receivable - current |  | $ | 1,577,031 |  |  | $ | 3,405,190 |
Accounts receivable - non current |  |  | 2,070,000 |  |  |  | - |
|  |  | 3,647,031 |  |  |  | 3,405,190 |
Allowance for doubtful accounts - current |  |  | (13,785 | ) |  |  | (13,785 | )
Allowance for doubtful accounts - non current |  |  | (500,000 | ) |  |  | - |
Accounts receivable, net of allowances for doubtful accounts |  | $ | 3,133,246 |  |  | $ | 3,391,405 |
Summary of Valuation Allowance [Table Text Block] |
|  | Balance at Beginning of Year |  |  | Charged to Costs and Expenses |  |  | Deductions From Reserves |  |  | Balance at End of Year |
Year Ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for Doubtful Accounts |  | $ | 13,785 |  |  | $ | 500,000 |  |  | $ | - |  |  | $ | 513,785 |
Year Ended December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for Doubtful Accounts |  | $ | 20,526 |  |  | $ | - |  |  | $ | (6,741 | ) |  | $ | 13,785 |
Useful Lives of Property Plan and Equipment [Table Text Block] |
|  | Years |
Equipment and leasehold improvements |  |  |  |  |
Equipment (years) |  | 3 | - | 5 |
Furniture and fixtures (years) |  | 3 | - | 5 |
Software (years) |  |  | 3 |  |
Leasehold improvements |  |  | life or lease term |  |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] |
|  | Year ended December 31, |
|  | 2016 |  |  | 2015 |
Selling, general and administrative |  | $ | 265,555 |  |  | $ | 202,073 |
Research, development and engineering |  |  | 74,786 |  |  |  | 139,042 |
|  | $ | 340,341 |  |  | $ | 341,115 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Year ended December 31, |
|  | 2016 |  |  | 2015 |
Weighted average Risk free interest rate |  |  | 1.11 | % |  |  | 1.46 | %
Expected life of options (in years) |  |  | 4.5 |  |  |  | 4.5 |
Expected dividends |  |  | 0 | % |  |  | 0 | %
Weighted average Volatility of stock price |  |  | 93 | % |  |  | 117 | %

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