| Schedule of fair value marketable securities |
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Fair Value Measurements Using |
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Balance as of December 31, 2022 |
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Quoted Prices in Active Markets for Identical Assets
(Level 1) |
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Significant Other Observable Inputs
(Level 2) |
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Significant Nonobservable Inputs (Level 3) |
| Marketable securities: |
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| Corporate Bonds |
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$ |
2,436,333 |
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$ |
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$ |
2,436,333 |
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$ |
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| Certificates of Deposits |
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491,185 |
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491,185 |
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| Total marketable securities |
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$ |
2,927,518 |
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$ |
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$ |
2,927,518 |
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$ |
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