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Note 12 - Stock-based Compensation (Details Textual) $ / shares in Units, $ in Thousands |  |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | ---
Jul. 03, 2025 USD ($) $ / shares shares | Jun. 02, 2025 $ / shares shares | Apr. 01, 2025 $ / shares shares | Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term (Year) |  |  |  |  |  | 5 years 9 months 14 days |
Restricted Stock Options [Member] | Subsequent Event [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) | shares | 575,000 |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) | 3 years |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Vesting Installments | 3 |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares | $ 3.3 |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ 1,898 |  |  |  |  |  |
Share-Based Payment Arrangement, Employee [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) | shares |  | 378,000,000 | 567,500 |  |  |  |
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) | $ / shares |  | $ 3,050.00 | $ 1.95 |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  | 3 years | 3 years |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) |  | 10 years | 10 years |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Accelerated Vesting, Number (in shares) | shares |  | 733,334,000 |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  |  | $ 1,149 |  |  |
Share-Based Payment Arrangement, Employee [Member] | Time Vesting Awards [Member] |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  |  | 1,249 | $ 3 | $ 1,251 | $ 6
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |  |  |  | $ 1,713 |  | $ 1,713 |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  |  |  |  | 2 years 10 months 2 days |
Share-Based Payment Arrangement, Employee [Member] | Valuation Technique, Black-Scholes-Merton Model [Member] | Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |
Debt Instrument, Measurement Input |  | 94 | 96 |  |  |  |
Share-Based Payment Arrangement, Employee [Member] | Valuation Technique, Black-Scholes-Merton Model [Member] | Measurement Input, Expected Term [Member] |  |  |  |  |  |  |
Debt Instrument, Measurement Input |  | 6.5 | 6.5 |  |  |  |
Share-Based Payment Arrangement, Employee [Member] | Valuation Technique, Black-Scholes-Merton Model [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |  |  |  |  |  |
Debt Instrument, Measurement Input |  | 4.17 | 4 |  |  |  |
Share-Based Payment Arrangement, Employee [Member] | Valuation Technique, Black-Scholes-Merton Model [Member] | Measurement Input, Expected Dividend Rate [Member] |  |  |  |  |  |  |
Debt Instrument, Measurement Input |  | 0 | 0 |  |  |  |
Share-Based Payment Arrangement, Employee [Member] | Valuation Technique, Black-Scholes-Merton Model [Member] | Measurement Input, Share Price [Member] |  |  |  |  |  |  |
Debt Instrument, Measurement Input |  | 3.05 | 1.95 |  |  |  |

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