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Stockholders Equity (Details Narrative) - USD ($) | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Jun. 15, 2022 | Dec. 31, 2021 | Aug. 05, 2020
Dividends declared | $ 425,490 | $ 427,217 |  |  |
Stock based compensation for stock options | 6,000 | 14,000 |  |  |
Share-based compensation under offering | 6,000 | 0 |  |  |
Stock based compensation for grants | $ 518,000 | $ 481,000 |  |  |
Weighted-average vesting period | 6 months |  |  |  |
Fair value of unamortized compensation cost | $ 3,000 |  |  |  |
Maximum share purchase under ESPP | 750,000 |  |  |  |
Maximum share purchased by employee | 5,000 |  |  |  |
Closing price of common stock | $ 5.32 |  |  |  |
Common stock shares authorized | 20,000,000 |  |  | 20,000,000 |
Held-to-Maturity Securities US Treasury Securities [Member] |  |  |  |  |
Common stock shares authorized | 700,000 |  |  |  | 1,400,000
Subsequent Event [Member] | Board Of Directors [Member] | February 2, 2022 [Member] |  |  |  |  |
Dividend per share |  |  | $ 0.04 |  |

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