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Note 2 - Cash, Cash Equivalents, and Investments | 9 Months Ended
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Sep. 30, 2023
Notes to Financial Statements |
Cash, Cash Equivalents, and Marketable Securities [Text Block] | Note 2: Cash, Cash Equivalents, 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 September 30, 2023, and December 31, 2022:
|  | September 30, 2023 (Unaudited) |
|  |  |  |  |  |  |  |  |  | Allowance |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Level |  |  |  |  |  |  | for |  |  | Unrealized |  |  | Unrealized |  |  |  |  |
|  | (1) |  |  | Fair Value |  |  | Credit Losses |  |  | Holding Gains |  |  | Holding Losses |  |  | Adjusted Cost |
Cash and Cash Equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  |  | $ | 434,388 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 434,388 |
Money Market Funds (2) |  |  | 1 |  |  |  | 6,968,788 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 6,968,788 |
Subtotal |  |  |  |  |  |  | 7,403,176 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 7,403,176 |
Short-Term Investment Securities (3) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate Bonds (4)(5) |  |  | 2 |  |  |  | 772,483 |  |  |  | — |  |  |  | — |  |  |  | 321 |  |  |  | 772,804 |
Total |  |  |  |  |  | $ | 8,175,659 |  |  | $ | — |  |  | $ | — |  |  | $ | 321 |  |  | $ | 8,175,980 |
|  | December 31, 2022 (Audited) |
|  |  |  |  |  |  |  |  | Allowance |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Level |  |  |  |  |  |  | for |  |  | Unrealized |  |  | Unrealized |  |  |  |  |
|  | (1) |  |  | Fair Value |  |  | Credit Losses |  |  | Holding Gains |  |  | Holding Losses |  |  | Adjusted Cost |
Cash and Cash Equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  | $ | 26,782 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 26,782 |
Money Market Funds (2) |  | 1 |  |  |  | 5,767,490 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 5,767,490 |
Subtotal |  |  |  |  |  | 5,794,272 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 5,794,272 |
Short-Term Investment Securities (3) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate Bonds (4)(5) |  | 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) All our money market funds were invested in U.S. Government money market funds. (3) Short-term investment securities will mature within 12 months or less, from the applicable reporting date. (4) For the three months ended September 30, 2023 and 2022, the Company received discounts of $1,148 and $5,072 to purchase held-to-maturity investment securities, respectively. For the nine months ended September 30, 2023 and 2022, the Company received discounts of $33,982 and paid premiums of $24,198 to purchase held-to-maturity investment securities, respectively. For the year ended December 31, 2022, the Company received discounts of $6,280 to purchase held-to-maturity investment securities. (5) The Company considers the declines in market value of its investment portfolio to be temporary in nature. As of September 30, 2023 and December 31, 2022, the Company did not consider any of its investments to be other-than-temporarily impaired and no allowance for credit losses was recorded.

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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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