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Note 8 - Stockholder's Equity - Schedule of Stockholder's Equity (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jan. 25, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Balance |  | $ 23,406 | $ 21,517 | $ 21,311 | $ 17,826 | $ 19,007 | $ 20,135 | $ 21,311 | $ 20,135
Common stock issued under restricted stock units (in shares) |  |  |  |  | 27,418 |  |  |  |
Common stock issued under restricted stock units |  | 0 |  |  | $ 0 |  |  |  |
Share-based compensation expense-stock options |  | 78 | 77 | 55 | 44 | 61 | 58 |  |
Share-based compensation expense-restricted stock units |  | 146 | 148 | 121 | 641 | 63 | 69 |  |
Treasury shares | $ (650) |  |  | (651) |  |  |  |  |
Net income (loss) |  | 2,357 | 1,664 | 681 | $ 90 | (1,340) | (1,270) | 4,702 | $ (2,520)
Common stock issued - exercised warrants |  | 0 |  |  |  |  |  |  |
Balance (in shares) |  |  |  |  | 3,722,970 |  |  |  | 3,722,970
Balance |  | $ 25,987 | 23,406 | 21,517 | $ 18,614 | 17,826 | 19,007 | $ 25,987 | $ 18,614
Common stock issued (in shares) |  |  |  |  | 1,254 |  |  |  |
Common stock issued |  |  |  |  | $ 13 | 35 | 15 |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |
Common stock issued under restricted stock units |  |  | $ 0 | $ 0 |  | $ 0 | $ 0 |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |
Balance (in shares) |  | 3,877,798 | 3,871,792 | 3,867,082 | 3,694,298 | 3,689,717 | 3,686,939 | 3,867,082 | 3,686,939
Balance |  | $ 2,327 | $ 2,323 | $ 2,320 | $ 2,217 | $ 2,214 | $ 2,212 | $ 2,320 | $ 2,212
Common stock issued under restricted stock units (in shares) |  | 21,327 |  |  |  |  |  |  |
Common stock issued under restricted stock units |  | $ 12 |  |  | 16 |  |  |  |
Share-based compensation expense-stock options |  | 0 | 0 | 0 | 0 | 0 | 0 |  |
Share-based compensation expense-restricted stock units |  | 0 | 0 | 0 | 0 | 0 | 0 |  |
Net income (loss) |  | $ 0 | $ 0 | $ 0 | 0 | $ 0 | $ 0 |  |
Common stock issued - exercised warrants (in shares) |  | 6,018 |  |  |  |  |  |  |
Common stock issued - exercised warrants |  | $ 4 |  |  |  |  |  |  |
Balance (in shares) |  | 3,905,143 | 3,877,798 | 3,871,792 |  | 3,694,298 | 3,689,717 | 3,905,143 |
Balance |  | $ 2,343 | $ 2,327 | $ 2,323 | 2,234 | $ 2,217 | $ 2,214 | $ 2,343 | 2,234
Common stock issued (in shares) |  |  |  |  |  | 2,661 | 858 |  |
Common stock issued |  |  |  |  | 1 | $ 2 | $ 1 |  |
Common Stock [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |
Common stock issued under restricted stock units (in shares) |  |  | 6,006 | 4,710 |  | 1,920 | 1,920 |  |
Common stock issued under restricted stock units |  |  | $ 4 | $ 3 |  | $ 1 | $ 1 |  |
Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |  |
Balance |  | 48,996 | 48,775 | 48,602 | 45,600 | 45,444 | 45,304 | 48,602 | 45,304
Common stock issued under restricted stock units |  | (12) |  |  | (16) |  |  |  |
Share-based compensation expense-stock options |  | 78 | 77 | 55 | 44 | 61 | 58 |  |
Share-based compensation expense-restricted stock units |  | 146 | 148 | 121 | 641 | 63 | 69 |  |
Treasury shares |  |  |  | 0 |  |  |  |  |
Net income (loss) |  | 0 | 0 | 0 | 0 | 0 | 0 |  |
Common stock issued - exercised warrants |  | (4) |  |  |  |  |  |  |
Balance |  | 49,204 | 48,996 | 48,775 | 46,281 | 45,600 | 45,444 | 49,204 | 46,281
Common stock issued |  |  |  |  | 12 | 33 | 14 |  |
Additional Paid-in Capital [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |
Common stock issued under restricted stock units |  |  | (4) | (3) |  | (1) | (1) |  |
Retained Earnings [Member] |  |  |  |  |  |  |  |  |
Balance |  | (21,864) | (23,528) | (24,209) | (24,589) | (23,249) | (21,979) | (24,209) | (21,979)
Common stock issued under restricted stock units |  | 0 |  |  | 0 |  |  |  |
Share-based compensation expense-stock options |  | 0 | 0 | 0 | 0 | 0 | 0 |  |
Share-based compensation expense-restricted stock units |  | 0 | 0 | 0 | 0 | 0 | 0 |  |
Treasury shares |  |  |  | 0 |  |  |  |  |
Net income (loss) |  | 2,357 | 1,664 | 681 | 90 | (1,340) | (1,270) |  |
Common stock issued - exercised warrants |  | 0 |  |  |  |  |  |  |
Balance |  | (19,507) | (21,864) | (23,528) | (24,499) | (24,589) | (23,249) | (19,507) | (24,499)
Common stock issued |  |  |  |  | 0 | 0 | 0 |  |
Retained Earnings [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |
Common stock issued under restricted stock units |  |  | 0 | 0 |  | 0 | 0 |  |
Treasury Stock, Common [Member] |  |  |  |  |  |  |  |  |
Balance |  | (6,053) | (6,053) | (5,402) | (5,402) | (5,402) | (5,402) | (5,402) | (5,402)
Common stock issued under restricted stock units |  | 0 |  |  | 0 |  |  |  |
Share-based compensation expense-stock options |  | 0 | 0 | 0 | 0 | 0 | 0 |  |
Share-based compensation expense-restricted stock units |  | 0 | 0 | 0 | 0 | 0 | 0 |  |
Treasury shares |  |  |  | (651) |  |  |  |  |
Net income (loss) |  | 0 | 0 | 0 | 0 | 0 | 0 |  |
Common stock issued - exercised warrants |  | 0 |  |  |  |  |  |  |
Balance |  | $ (6,053) | (6,053) | (6,053) | (5,402) | (5,402) | (5,402) | $ (6,053) | $ (5,402)
Common stock issued |  |  |  |  | $ 0 | 0 | 0 |  |
Treasury Stock, Common [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |
Common stock issued under restricted stock units |  |  | $ 0 | $ 0 |  | $ 0 | $ 0 |  |

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