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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - € / shares
Mar. 31, 2022
Dec. 31, 2021
Common stock, par value (in EUR per share) € 0.06 € 0.06
Common stock, shares authorized (in shares) 200,000,000 200,000,000
Common stock, shares issued (in shares) 110,033,225 109,697,040
Common stock, shares outstanding (in shares) 109,378,748 109,142,925
Treasury stock, shares (in shares) 654,477 554,115