Note 13 - Revenue Recognition - Composition of Revenue From Services (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue from Contract with Customer, Excluding Assessed Tax	$ 173,632	$ 178,595	$ 529,504	$ 681,591
Service [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	121,271	131,679	377,557	391,100
Healthcare Insurers [Member] | Service [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	76,184	81,469	229,600	238,934
Government Payers [Member] | Service [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	20,368	19,909	63,561	61,250
Client Payers [Member] | Service [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	20,773	25,906	71,521	77,973
Self-Pay [Member] | Service [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,946	$ 4,395	$ 12,875	$ 12,943