Note 6 - Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Goodwill, balance as of the beginning of the period	$ 400,610	$ 128,752
Goodwill acquired during the period		280,925
Goodwill, foreign currency translation adjustment	(7,981)	(9,067)
Goodwill acquired (impaired)	(118,638)
Goodwill, balance as of the end of the period	273,991	400,610
UNITED STATES
Goodwill, balance as of the beginning of the period	273,991	123,883
Goodwill acquired during the period		150,108
Goodwill, foreign currency translation adjustment	0	0
Goodwill acquired (impaired)	0
Goodwill, balance as of the end of the period	273,991	273,991
Europe [Member]
Goodwill, balance as of the beginning of the period	125,989	4,239
Goodwill acquired during the period		130,817
Goodwill, foreign currency translation adjustment	(7,981)	(9,067)
Goodwill acquired (impaired)	(118,008)
Goodwill, balance as of the end of the period	0	125,989
JAPAN
Goodwill, balance as of the beginning of the period	630	630
Goodwill acquired during the period		0
Goodwill, foreign currency translation adjustment	0	0
Goodwill acquired (impaired)	(630)
Goodwill, balance as of the end of the period	$ 0	$ 630