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Note 6 - Accrued Expenses | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Notes to Financial Statements |  |
Accounts Payable and Accrued Liabilities Disclosure [Text Block] | 6. Accrued Expenses Accrued expenses as shown on the accompanying Condensed Consolidated Balance Sheets are composed of the following as of September 30, 2021 and December 31, 2020:
|  | September 30, 2021 |  |  | December 31, 2020 |
Accrued salaries |  | $ | 11,212 |  |  | $ | 279,696 |
Other accrued expenses |  |  | 35,000 |  |  |  | 79,585 |
Total accrued expenses |  | $ | 46,212 |  |  | $ | 359,281 |
| 4. Accrued Expenses Accrued expenses as shown on the accompanying Consolidated Balance Sheets is composed of the following as of December 31, 2020 and 2019:
|  | 2020 |  |  | 2019 |
Accrued salaries and directors’ fees |  | $ | 279,696 |  |  | $ | 1,732,702 |
Other accrued expenses |  |  | 79,585 |  |  |  | 118,338 |
Total accrued expenses |  | $ | 359,281 |  |  | $ | 1,851,040 |

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- Definition The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a),20,24) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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