Note 14 - Warrants (Details Textual) - shares			12 Months Ended		36 Months Ended
	Mar. 25, 2021	May 14, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Class of Warrant or Right, Exercised During Period (in shares)			79,100	3,871,405	3,879,905
WAVI Holding AG and Taurus4757 GmbH Warrants [Member]
Stock Issued During Period, Shares, Cashless Warrant Exercises (in shares)		2,747,970
Class of Warrant or Right, Exercised During Period (in shares)		3,871,405
Warrants Exercised [Member]
Stock Issued During Period, Shares, Cashless Warrant Exercises (in shares)	70,030
Class of Warrant or Right, Exercised During Period (in shares)	79,100