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Note 17 - Subsequent Events (Details Textual) € / shares in Units, $ in Thousands			12 Months Ended
	Mar. 25, 2025 EUR (€) € / shares shares	Feb. 12, 2025 EUR (€)	Dec. 31, 2024 EUR (€)	Dec. 31, 2023 EUR (€)	Sep. 30, 2025 € / shares	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Proceeds from Convertible Debt | €			€ 7,000,000	€ 0
Debt Instrument, Face Amount | $						$ 27,656	$ 20,000
Subsequent Event [Member] | Yorkville [Member] | Yorkville Commitment [Member]
Proceeds from Convertible Debt | €		€ 5,000,000
Subsequent Event [Member] | Yorkville [Member] | Omnibus Amendment to Transaction Documents [Member]
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger	85.00%
Proceeds from Convertible Debt | €	€ 1,000,000	€ 1,000,000
Debt Instrument, Face Amount | €	€ 3,000,000
Debt Instrument, Interest Rate, Stated Percentage	12.00%
Debt Instrument, Default Rate	18.00%
Debt Instrument, Convertible, Conversion Price (in dollars per share) | € / shares	€ 18.75
Convertible Preferred Stock [Member] | Yorkville [Member] | Forecast [Member]
Preferred Stock, Convertible, Conversion Price (in EUR per share) | € / shares					€ 1
Convertible Preferred Stock [Member] | Subsequent Event [Member] | Yorkville [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares	1,242
Preferred Stock, Par or Stated Value Per Share (in EUR per share) | € / shares	€ 300
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger	85.00%
Preferred Stock, Convertible, Conversion Price (in EUR per share) | € / shares	€ 4

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