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Note 2 - Cash, Cash Equivalents, and Investments | 12 Months Ended
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Dec. 31, 2023
Notes to Financial Statements |
Cash, Cash Equivalents, and Marketable Securities [Text Block] | Note 2: Cash, Cash Equivalent, and Investments The Company’s investments in debt securities are classified as held-to-maturity and are recorded at amortized cost, net of allowance for credit losses, and its investments in money market funds are classified as available-for-sale securities and presented as cash equivalents on the consolidated balance sheets. The following table shows the Company’s cash, available-for-sale securities, and investment securities by major security type as of December 31, 2023 and 2022:
|  | December 31, 2023 |
|  |  |  |  |  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Level |  |  |  |  |  |  | Unrealized |  |  | Unrealized |  |  |  |  |
|  |  | (1) |  |  | Fair Value |  |  | Holding Gains |  |  | Holding Losses |  |  | Adjusted Cost |
Cash and Cash Equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  |  | $ | 25,775 |  |  | $ | — |  |  | $ | — |  |  | $ | 25,775 |
Money Market Funds |  |  | 1 |  |  |  | 6,489,253 |  |  |  | — |  |  |  | — |  |  |  | 6,489,253 |
Subtotal |  |  |  |  |  |  | 6,515,028 |  |  |  | — |  |  |  | — |  |  |  | 6,515,028 |
Short-Term Investment Securities (2) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate Bonds (3) |  |  | 2 |  |  |  | 748,105 |  |  |  | — |  |  |  | (185 | ) |  |  | 748,290 |
Total |  |  |  |  |  | $ | 7,263,133 |  |  | $ | — |  |  | $ | (185 | ) |  | $ | 7,263,318 |
|  | December 31, 2022 |
|  |  |  |  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Level |  |  |  |  |  |  | Unrealized |  |  | Unrealized |  |  |  |  |
|  | (1) |  |  | Fair Value |  |  | Holding Gains |  |  | Holding Losses |  |  | Adjusted Cost |
Cash and Cash Equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  | $ | 26,782 |  |  | $ | — |  |  | $ | — |  |  | $ | 26,782 |
Money Market Funds |  | 1 |  |  |  | 5,767,490 |  |  |  | — |  |  |  | — |  |  |  | 5,767,490 |
Subtotal |  |  |  |  |  | 5,794,272 |  |  |  | — |  |  |  | — |  |  |  | 5,794,272 |
Short-Term Investment Securities (2) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate Bonds (3) |  | 2 |  |  |  | 6,800,062 |  |  |  | — |  |  |  | (47,208 | ) |  |  | 6,847,270 |
Total |  |  |  |  | $ | 12,594,334 |  |  | $ | — |  |  | $ | (47,208 | ) |  | $ | 12,641,542 |
Notes: (1) Definition of the three-level fair value hierarchy:
| • | Level 1 - Quoted prices (unadjusted) in active markets for identical assets or liabilities
| • | Level 2 - Other inputs that are directly or indirectly observable in the markets
| • | Level 3 - Inputs that are generally unobservable
(2) Short-term investment securities will mature within 12 months or less, from the applicable reporting date. (3) For the years ended December 31, 2023 and 2022, the Company received discounts of $39,012 and $6,280 to purchase held-to-maturity investment securities, respectively. The Company considers declines in market value of its investment portfolio to be temporary in nature. The Company’s investment policy requires investment securities to be investment grade and held to maturity with the primary objective to maintain a high degree of liquidity while maximizing yield. When evaluating an investment for other-than-temporary impairment, the Company reviews factors such as the length of time and extent to which fair value has been below its cost basis, the financial condition of the issuer and any changes thereto, changes in market interest rates, and whether it is more likely than not the Company will be required to sell the investment before recovery of the investment’s cost basis. As of December 31, 2023, the Company does not consider any of its investments to be other-than-temporarily impaired.

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- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//320/tableOfContent + Details
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