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Note 19 - Revisions of Previously Issued Unaudited Consolidated Financial Statements (Unaudited) - Stockholders' Equity Statement (Details) - 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
Balance (in shares) |  |  | 12,226,306 |  |  | 13,115,341 | 12,226,306 | 13,115,341
Balance | $ 61,121,000 | $ 60,986,000 | $ 60,758,000 | $ 61,949,000 | $ 62,419,000 | $ 61,751,000 | $ 60,758,000 | $ 61,751,000
Net income | 1,430,000 | 1,146,000 | 552,000 | 503,000 | 693,000 | 1,522,000 | $ 4,189,000 | $ 3,282,000
Common stock repurchased and retired (in shares) |  |  |  |  |  |  | (951,010) | (910,700)
Common stock repurchased and retired | (1,049,000) | (1,097,000) | (833,000) | (1,116,000) | (960,000) | (756,000) | $ (4,002,000) | $ (3,882,000)
Stock-based compensation expense | 24,000 | 22,000 | 22,000 | 32,000 | 32,000 | 55,000 | $ 170,000 | $ 147,000
Options exercised (in shares) |  |  |  |  |  |  | 140,916 | 21,665
Options exercised | 36,000 | 54,000 | 350,000 | 30,000 | 30,000 |  | $ 464,000 | $ 80,000
Total comprehensive income | (152,000) | 21,000 | 137,000 | (137,000) | (265,000) | (153,000) | 4,241,000 | $ 2,662,000
Treasury stock excise tax | (19,000) | (11,000) |  |  |  |  | $ (40,000) |
Balance (in shares) |  |  |  |  |  |  | 11,416,212 | 12,226,306
Balance | 61,391,000 | 61,121,000 | 60,986,000 | 61,261,000 | 61,949,000 | 62,419,000 | $ 61,568,000 | $ 60,758,000
Previously Reported [Member] |  |  |  |  |  |  |  |
Balance | 61,121,000 | 60,986,000 | 60,758,000 | 61,949,000 | 62,419,000 | 61,751,000 | $ 60,758,000 | 61,751,000
Net income | 1,430,000 | 1,146,000 | 552,000 | 503,000 | 693,000 | 1,522,000 |  |
Common stock repurchased and retired | (1,049,000) | (1,097,000) | (833,000) | (1,116,000) | (960,000) | (756,000) |  |
Stock-based compensation expense | 24,000 | 22,000 | 22,000 | 32,000 | 32,000 | 55,000 |  |
Options exercised | 36,000 | 54,000 | 350,000 | 30,000 | 30,000 |  |  |
Total comprehensive income | (152,000) | 21,000 | 137,000 | (137,000) | (265,000) | (153,000) |  |
Treasury stock excise tax | (19,000) | (11,000) |  |  |  |  |  |
Balance | $ 61,391,000 | $ 61,121,000 | $ 60,986,000 | $ 61,261,000 | $ 61,949,000 | $ 62,419,000 |  | $ 60,758,000
Common Stock [Member] |  |  |  |  |  |  |  |
Balance (in shares) | 11,875,556 | 12,135,556 | 12,226,306 | 12,728,173 | 12,945,341 | 13,115,341 | 12,226,306 | 13,115,341
Balance | $ 119,000 | $ 122,000 | $ 123,000 | $ 128,000 | $ 130,000 | $ 132,000 | $ 123,000 | $ 132,000
Net income | $ 0 | $ 0 |  | $ 0 | $ 0 | $ 0 |  |
Common stock repurchased and retired (in shares) | (249,110) | (275,000) | (200,000) | (259,200) | (225,500) | (170,000) | (951,010) | (910,700)
Common stock repurchased and retired | $ (2,000) | $ (3,000) | $ (2,000) | $ (2,000) | $ (2,000) | $ (2,000) | $ (10,000) | $ (9,000)
Stock-based compensation expense | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | 0 |  | $ 0
Options exercised (in shares) | 10,000 | 15,000 | 109,250 | 8,332 | 8,332 |  | 140,916 | 21,665
Options exercised | $ 0 | $ 0 | $ 1,000 | $ 0 | $ 0 |  |  | $ 0
Total comprehensive income | 0 | 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0
Treasury stock excise tax | $ 0 | $ 0 |  |  |  |  |  |
Balance (in shares) | 11,636,446 | 11,875,556 | 12,135,556 | 12,477,305 | 12,728,173 | 12,945,341 | 11,416,212 | 12,226,306
Balance | $ 117,000 | $ 119,000 | $ 122,000 | $ 126,000 | $ 128,000 | $ 130,000 | $ 114,000 | $ 123,000
Common Stock [Member] | Previously Reported [Member] |  |  |  |  |  |  |  |
Balance (in shares) | 11,875,556 | 12,135,556 | 12,226,306 | 12,728,173 | 12,945,341 | 13,115,341 | 12,226,306 | 13,115,341
Balance | $ 119,000 | $ 122,000 | $ 123,000 | $ 128,000 | $ 130,000 | $ 132,000 | $ 123,000 | $ 132,000
Net income | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 |  |
Common stock repurchased and retired (in shares) | (249,110) | (275,000) | (200,000) | (259,200) | (225,500) | (170,000) |  |
Common stock repurchased and retired | $ (2,000) | $ (3,000) | $ (2,000) | $ (2,000) | $ (2,000) | $ (2,000) |  |
Stock-based compensation expense | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | 0 |  |
Options exercised (in shares) | 10,000 | 15,000 | 109,250 | 8,332 | 8,332 |  |  |
Options exercised | $ 0 | $ 0 | $ 1,000 | $ 0 | $ 0 |  |  |
Total comprehensive income | 0 | 0 | $ 0 | $ 0 | $ 0 | $ 0 |  |
Treasury stock excise tax | $ 0 | $ 0 |  |  |  |  |  |
Balance (in shares) | 11,636,446 | 11,875,556 | 12,135,556 | 12,477,305 | 12,728,173 | 12,945,341 |  | 12,226,306
Balance | $ 117,000 | $ 119,000 | $ 122,000 | $ 126,000 | $ 128,000 | $ 130,000 |  | $ 123,000
Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |
Balance | 16,865,000 | 17,190,000 | 17,099,000 | 17,700,000 | 17,951,000 | 18,131,000 | 17,099,000 | 18,131,000
Net income | 0 | 0 |  | 0 | 0 | 0 |  |
Common stock repurchased and retired | (354,000) | (390,000) | (280,000) | (360,000) | (313,000) | (235,000) | (1,330,000) | (1,259,000)
Stock-based compensation expense | 24,000 | 22,000 | 22,000 | 32,000 | 32,000 | 55,000 | 170,000 | 147,000
Options exercised | 36,000 | 54,000 | 349,000 | 30,000 | 30,000 |  | 463,000 | 80,000
Total comprehensive income | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
Treasury stock excise tax | (19,000) | (11,000) |  |  |  |  | (40,000) |
Balance | 16,552,000 | 16,865,000 | 17,190,000 | 17,402,000 | 17,700,000 | 17,951,000 | 16,339,000 | 17,099,000
Additional Paid-in Capital [Member] | Previously Reported [Member] |  |  |  |  |  |  |  |
Balance | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
Net income | 0 | 0 | 0 | 0 | 0 | 0 |  |
Common stock repurchased and retired | (41,000) | (65,000) | (371,000) | (62,000) | (62,000) | (55,000) |  | (227,000)
Stock-based compensation expense | 24,000 | 22,000 | 22,000 | 32,000 | 32,000 | 55,000 |  |
Options exercised | 36,000 | 54,000 | 349,000 | 30,000 | 30,000 |  |  |
Total comprehensive income | 0 | 0 | 0 | 0 | 0 | 0 |  |
Treasury stock excise tax | (19,000) | (11,000) |  |  |  |  |  |
Balance | 0 | 0 | 0 | 0 | 0 | 0 |  | 0
Retained Earnings [Member] |  |  |  |  |  |  |  |
Balance | 45,468,000 | 45,026,000 | 45,025,000 | 45,408,000 | 45,360,000 | 44,357,000 | 45,025,000 | 44,357,000
Net income | 1,430,000 | 1,146,000 | 552,000 | 503,000 | 693,000 | 1,522,000 |  |
Common stock repurchased and retired | (693,000) | (704,000) | (551,000) | (754,000) | (645,000) | (519,000) | (2,662,000) | (2,614,000)
Stock-based compensation expense | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
Options exercised | 0 | 0 | 0 | 0 | 0 |  |  | 0
Total comprehensive income | 0 | 0 | 0 | 0 | 0 | 0 | 4,189,000 | 3,282,000
Treasury stock excise tax | 0 | 0 |  |  |  |  |  |
Balance | 46,205,000 | 45,468,000 | 45,026,000 | 45,157,000 | 45,408,000 | 45,360,000 | 46,552,000 | 45,025,000
Retained Earnings [Member] | Previously Reported [Member] |  |  |  |  |  |  |  |
Balance | 62,333,000 | 62,216,000 | 62,124,000 | 63,108,000 | 63,311,000 | 62,488,000 | 62,124,000 | 62,488,000
Net income | 1,430,000 | 1,146,000 | 552,000 | 503,000 | 693,000 | 1,522,000 |  |
Common stock repurchased and retired | (1,006,000) | (1,029,000) | (460,000) | (1,052,000) | (896,000) | (699,000) |  | (3,646,000)
Stock-based compensation expense | 0 | 0 | 0 | 0 | 0 | 0 |  |
Options exercised | 0 | 0 | 0 | 0 | 0 |  |  |
Total comprehensive income | 0 | 0 | 0 | 0 | 0 | 0 |  |
Treasury stock excise tax | 0 | 0 |  |  |  |  |  |
Balance | 62,757,000 | 62,333,000 | 62,216,000 | 62,559,000 | 63,108,000 | 63,311,000 |  | 62,124,000
AOCI Attributable to Parent [Member] |  |  |  |  |  |  |  |
Balance | (1,331,000) | (1,352,000) | (1,489,000) | (1,287,000) | (1,022,000) | (869,000) | (1,489,000) | (869,000)
Net income | 0 | 0 |  | 0 | 0 | 0 |  |
Common stock repurchased and retired | 0 | 0 | 0 | 0 | 0 | 0 |  | 0
Stock-based compensation expense | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
Options exercised | 0 | 0 | 0 | 0 | 0 |  | 0 | 0
Total comprehensive income | (152,000) | 21,000 | 137,000 | (137,000) | (265,000) | (153,000) | 52,000 | (620,000)
Treasury stock excise tax | 0 | 0 |  |  |  |  |  |
Balance | (1,483,000) | (1,331,000) | (1,352,000) | (1,424,000) | (1,287,000) | (1,022,000) | (1,437,000) | (1,489,000)
AOCI Attributable to Parent [Member] | Previously Reported [Member] |  |  |  |  |  |  |  |
Balance | (1,331,000) | (1,352,000) | (1,489,000) | (1,287,000) | (1,022,000) | (869,000) | $ (1,489,000) | (869,000)
Net income | 0 | 0 | 0 | 0 | 0 | 0 |  |
Common stock repurchased and retired | 0 | 0 | 0 | 0 | 0 | 0 |  |
Stock-based compensation expense | 0 | 0 | 0 | 0 | 0 | 0 |  |
Options exercised | 0 | 0 | 0 | 0 | 0 |  |  |
Total comprehensive income | (152,000) | 21,000 | 137,000 | (137,000) | (265,000) | (153,000) |  |
Treasury stock excise tax | 0 | 0 |  |  |  |  |  |
Balance | $ (1,483,000) | $ (1,331,000) | $ (1,352,000) | $ (1,424,000) | $ (1,287,000) | $ (1,022,000) |  | $ (1,489,000)

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