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Note N - Equity - Balances and Conversion of Preferred Shares and Accrued Dividends (Details) - USD ($) | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
May 31, 2018 | Apr. 30, 2018 | Mar. 31, 2018 | Oct. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2016
Series A-1 Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Balance (in shares) |  |  |  |  |  |  |  | 62,596 |  |  |  |  | 90,000
Conversion of preferred stock to common stock, Converted (in shares) | (23,508) | (39,088) |  | (27,404) |  |  |  |  |  |  |  |  |
Balance |  |  |  |  |  |  |  | $ 236,658 |  |  |  |  | $ 270,000
Accrual of dividends |  |  |  |  |  | $ 25,463 | $ 93,894 | $ 101,658 | $ 135,000 | $ 135,000 | $ 135,000 |  |
Conversion into common stock | $ (25,463) | $ (330,552) |  |  | $ (540,000) |  |  |  |  |  |  |  |
Series B-1 Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Balance (in shares) |  |  |  |  |  |  |  | 105,000 |  |  |  |  | 105,000
Conversion of preferred stock to common stock, Converted (in shares) | (44,580) |  | (60,420) |  |  |  |  |  |  |  |  |  |
Balance |  |  |  |  |  |  |  | $ 393,750 |  |  |  |  | $ 131,250
Accrual of dividends |  |  |  |  |  | $ 16,408 | $ 62,268 | $ 65,625 | $ 65,625 | $ 65,625 | $ 65,625 |  |
Conversion into common stock | $ (55,342) |  | $ (417,084) |  |  |  |  |  |  |  |  |  |

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- Definition The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 + Details
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