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Note 4 - Accounts Receivable (Tables) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022
Notes Tables |  |
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] |
|  | March 31, |  |  | December 31, |
|  | 2023 |  |  | 2022 |
Accounts receivable |  | $ | 3,985,988 |  |  | $ | 2,096,569 |
Allowance for doubtful accounts |  |  | (623,785 | ) |  |  | (573,785 | )
Accounts receivable, net of allowances for doubtful accounts |  | $ | 3,362,203 |  |  | $ | 1,522,784 |
|  | December 31, |
|  | 2022 |  |  | 2021 |
Accounts receivable |  | $ | 2,096,569 |  |  | $ | 1,234,411 |
Loss on foreign currency |  |  | - |  |  |  | (50,000 | )
Allowance for doubtful accounts |  |  | (573,785 | ) |  |  | (213,785 | )
Accounts receivable, net of allowances for doubtful accounts |  | $ | 1,522,784 |  |  | $ | 970,626 |
|  | Balance at Beginning of Year |  |  | Charged to Costs and Expenses |  |  | Deductions from Reserves |  |  | Balance at End of Year |
Year ended December 31, 2022 Allowance for Doubtful Accounts |  | $ | 213,785 |  |  | $ | 360,000 |  |  | $ | - |  |  | $ | 573,785 |
Year ended December 31, 2021 Allowance for Doubtful Accounts |  | $ | 1,733,785 |  |  | $ | 200,000 |  |  | $ | (1,720,000 | ) |  | $ | 213,785 |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- References No definition available. + Details
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