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Note 12 - Subsequent Events (Details Textual) $ / shares in Units, R$ in Millions | Apr. 18, 2024 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2024 BRL (R$) | May 03, 2024 $ / shares shares | Apr. 08, 2024 USD ($) | Mar. 26, 2024 | Feb. 07, 2024
--- | --- | --- | --- | --- | --- | --- | ---
Subsequent Event [Member] |  |  |  |  |  |  |
Treasury Stock, Common, Shares (in shares) | shares |  |  |  | 1,000,000 |  |  |
Common Stock Closing Price (in dollars per share) | $ / shares |  |  |  | $ 1.8 |  |  |
Subsequent Event [Member] | Resource Plus, Inc [Member] |  |  |  |  |  |  |
Payments to Acquire Interest in Joint Venture | $ 3,000,000 |  |  |  |  |  |
Subsequent Event [Member] | Resource Plus Acquisition Note [Member] |  |  |  |  |  |  |
Payments to Acquire Interest in Joint Venture | 250,000 |  |  |  |  |  |
Debt Instrument, Face Amount | $ 2,750,000 |  |  |  |  |  |
Subsequent Event [Member] | SPAR Marketing Force [Member] |  |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Consideration |  |  |  |  | $ 200,000 |  |
Subsequent Event [Member] | Brazil Joint Venture [Member] |  |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Consideration |  | $ 11,800,000 | R$ 58.9 |  |  |  |
SGRP Meridian [Member] |  |  |  |  |  |  |
Subsidiary, Ownership Percentage, Parent |  |  |  |  |  |  | 51.00%
SPAR Marketing Force [Member] |  |  |  |  |  |  |
Subsidiary, Ownership Percentage, Parent |  |  |  |  |  | 51.00% |

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