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Note 2 - Cash, Cash Equivalents, and Investments (Tables) | 3 Months Ended
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Mar. 31, 2025
Notes Tables |
Cash, Cash Equivalent, and Investment [Table Text Block] |
|  | March 31, 2025 (Unaudited) |
|  |  |  |  |  |  |  |  |  | Allowance |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Level |  |  |  |  |  |  | for |  |  | Unrealized |  |  | Unrealized |  |  |  |  |
|  | (1) |  |  | Fair Value |  |  | Credit Losses |  |  | Holding Gains |  |  | Holding Losses |  |  | Adjusted Cost |
Cash and Cash Equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  |  | $ | 1,542,566 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1,542,566 |
Money Market Funds (2) |  |  | 1 |  |  |  | 3,522,375 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3,522,375 |
Subtotal |  |  |  |  |  |  | 5,064,941 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 5,064,941 |
Short-Term Investment Securities (3) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate Bonds (4)(5) |  |  | 2 |  |  |  | 2,284,090 |  |  |  | — |  |  |  | — |  |  |  | (382 | ) |  |  | 2,284,472 |
Total |  |  |  |  |  | $ | 7,349,031 |  |  | $ | — |  |  | $ | — |  |  | $ | (382 | ) |  | $ | 7,349,413 |
|  | December 31, 2024 (Audited) |
|  |  |  |  |  |  |  |  |  | Allowance |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Level |  |  |  |  |  |  | for |  |  | Unrealized |  |  | Unrealized |  |  |  |  |
|  | (1) |  |  | Fair Value |  |  | Credit Losses |  |  | Holding Gains |  |  | Holding Losses |  |  | Adjusted Cost |
Cash and Cash Equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  |  | $ | 926,287 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 926,287 |
Money Market Funds (2) |  |  | 1 |  |  |  | 5,580,463 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 5,580,463 |
Subtotal |  |  |  |  |  |  | 6,506,750 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 6,506,750 |
Short-Term Investment Securities (3) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate Bonds (4)(5) |  |  | 2 |  |  |  | 2,756,428 |  |  |  | — |  |  |  | — |  |  |  | (149 | ) |  |  | 2,756,577 |
Total |  |  |  |  |  | $ | 9,263,178 |  |  | $ | — |  |  | $ | — |  |  | $ | (149 | ) |  | $ | 9,263,327 |

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- References No definition available. + Details
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