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Note A - The Company and Summary of Significant Accounting Policies - Summary of Accounts Receivable (Details) - USD ($) | Dec. 31, 2016 | Dec. 31, 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

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