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Marketable Securities (Details - Contractual maturities) | Sep. 30, 2021 USD ($)
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Debt Instrument [Line Items] |  |
Fair Value | $ 125,340,336 |
Due After Five Years Through Ten Years [Member] |  |
Debt Instrument [Line Items] |  |
Fair Value | 6,740,772 |
Due After Ten Years [Member] |  |
Debt Instrument [Line Items] |  |
Fair Value | 13,726,182 | [1]
Due After One Year Through Five Years [Member] |  |
Debt Instrument [Line Items] |  |
Fair Value | $ 104,873,382 |
[1] | Included within this category are municipal bonds with a fair value of $2,300,000 that the Company plans to sell within the next twelve months.

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