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v3.24.0.1

Note 2 - Change in Accounting Policy (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Additional Paid in Capital | $ 16,552,000 | $ 16,865,000 | $ 17,190,000 | $ 17,402,000 | $ 17,700,000 | $ 17,951,000 | $ 16,339,000 | $ 17,099,000 |
Retained Earnings (Accumulated Deficit) | (46,205,000) | (45,468,000) | (45,026,000) | (45,157,000) | (45,408,000) | (45,360,000) | (46,552,000) | (45,025,000) |
Equity, Attributable to Parent | 61,391,000 | 61,121,000 | 60,986,000 | 61,261,000 | 61,949,000 | 62,419,000 | 61,568,000 | 60,758,000 | $ 61,751,000
Stock Repurchased and Retired During Period, Value | 1,049,000 | 1,097,000 | 833,000 | 1,116,000 | 960,000 | 756,000 | 4,002,000 | 3,882,000 |
Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |  |
Equity, Attributable to Parent | 16,552,000 | 16,865,000 | 17,190,000 | 17,402,000 | 17,700,000 | 17,951,000 | 16,339,000 | 17,099,000 | 18,131,000
Stock Repurchased and Retired During Period, Value | 354,000 | 390,000 | 280,000 | 360,000 | 313,000 | 235,000 | 1,330,000 | 1,259,000 |
Retained Earnings [Member] |  |  |  |  |  |  |  |  |
Equity, Attributable to Parent | 46,205,000 | 45,468,000 | 45,026,000 | 45,157,000 | 45,408,000 | 45,360,000 | 46,552,000 | 45,025,000 | 44,357,000
Stock Repurchased and Retired During Period, Value | 693,000 | 704,000 | 551,000 | 754,000 | 645,000 | 519,000 | $ 2,662,000 | 2,614,000 |
Revision of Prior Period, Adjustment [Member] |  |  |  |  |  |  |  |  |
Additional Paid in Capital | 16,552,000 | 16,865,000 | 17,190,000 | 17,402,000 | 17,700,000 | 17,951,000 |  | 17,099,000 |
Retained Earnings (Accumulated Deficit) | 16,552,000 | 16,865,000 | 17,190,000 | 17,402,000 | 17,700,000 | 17,951,000 |  | 17,099,000 |
Previously Reported [Member] |  |  |  |  |  |  |  |  |
Additional Paid in Capital | 0 | 0 | 0 | 0 | 0 | 0 |  | 0 |
Retained Earnings (Accumulated Deficit) | (62,757,000) | (62,333,000) | (62,216,000) | (62,559,000) | (63,108,000) | (63,311,000) |  | (62,124,000) |
Equity, Attributable to Parent | 61,391,000 | 61,121,000 | 60,986,000 | 61,261,000 | 61,949,000 | 62,419,000 |  | 60,758,000 | 61,751,000
Stock Repurchased and Retired During Period, Value | 1,049,000 | 1,097,000 | 833,000 | 1,116,000 | 960,000 | 756,000 |  |  |
Previously Reported [Member] | Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |  |
Equity, Attributable to Parent | 0 | 0 | 0 | 0 | 0 | 0 |  | 0 | 0
Stock Repurchased and Retired During Period, Value | 41,000 | 65,000 | 371,000 | 62,000 | 62,000 | 55,000 |  | 227,000 |
Previously Reported [Member] | Retained Earnings [Member] |  |  |  |  |  |  |  |  |
Equity, Attributable to Parent | 62,757,000 | 62,333,000 | 62,216,000 | 62,559,000 | 63,108,000 | 63,311,000 |  | 62,124,000 | $ 62,488,000
Stock Repurchased and Retired During Period, Value | $ 1,006,000 | $ 1,029,000 | $ 460,000 | $ 1,052,000 | $ 896,000 | $ 699,000 |  | $ 3,646,000 |

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