Note 8 - Business Segments - Summary of Financial Information by Reporting Segment (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Revenue from Contract with Customer, Including Assessed Tax	$ 254,817,000	$ 227,383,000	$ 708,648,000	$ 697,149,000
Other revenues	11,491,000	11,111,000	33,916,000	34,463,000
Government Assistance Stimulus Income CARES Act	10,429,000	12,132,000	48,304,000	36,780,000
Net operating revenues and grant income	276,737,000	250,626,000	790,868,000	768,392,000
Costs and expenses:
Salaries, wages, and benefits	159,305,000	151,564,000	461,239,000	455,947,000
Other operating	84,039,000	70,887,000	226,235,000	213,416,000
Operating Lease, Expense	10,204,000	10,320,000	30,437,000	30,972,000
Depreciation and amortization	10,229,000	10,548,000	30,521,000	31,531,000
Interest	198,000	285,000	657,000	1,150,000
Total costs and expenses	263,975,000	243,604,000	749,089,000	733,016,000
Income (loss) from operations	12,762,000	7,022,000	41,779,000	35,376,000
Non-operating income (loss)	3,399,000	6,478,000	15,245,000	18,870,000
Equity Securities, FV-NI, Unrealized Gain (Loss), Total	(23,797,000)	(241,000)	(23,227,000)	(40,580,000)
Income (loss) before income taxes	(7,636,000)	13,259,000	128,999,000	15,374,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	0	0	95,202,000	1,708,000
Inpatient Services Segment [Member]
Revenues:
Revenue from Contract with Customer, Including Assessed Tax	222,884,000	214,211,000	644,986,000	659,585,000
Other revenues	128,000	84,000	324,000	645,000
Government Assistance Stimulus Income CARES Act	10,429,000	12,132,000	48,304,000	34,754,000
Net operating revenues and grant income	233,441,000	226,427,000	693,614,000	694,984,000
Costs and expenses:
Salaries, wages, and benefits	131,567,000	132,245,000	388,949,000	403,840,000
Other operating	74,506,000	65,066,000	204,445,000	194,170,000
Operating Lease, Expense	8,169,000	8,377,000	24,641,000	25,134,000
Depreciation and amortization	9,300,000	9,629,000	27,790,000	28,826,000
Interest	198,000	325,000	657,000	1,073,000
Total costs and expenses	223,740,000	215,642,000	646,482,000	653,043,000
Income (loss) from operations	9,701,000	10,785,000	47,132,000	41,941,000
Non-operating income (loss)	0	0	0	0
Equity Securities, FV-NI, Unrealized Gain (Loss), Total	0	0	0	0
Income (loss) before income taxes	9,701,000	10,785,000	47,132,000	41,941,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain			0	0
Homecare and Hospice Segment [Member]
Revenues:
Revenue from Contract with Customer, Including Assessed Tax	31,933,000	13,172,000	63,662,000	37,564,000
Other revenues	0	0	0	0
Government Assistance Stimulus Income CARES Act	0	0	0	2,026,000
Net operating revenues and grant income	31,933,000	13,172,000	63,662,000	39,590,000
Costs and expenses:
Salaries, wages, and benefits	17,592,000	8,210,000	36,483,000	24,490,000
Other operating	6,797,000	3,311,000	13,730,000	11,471,000
Operating Lease, Expense	594,000	448,000	1,478,000	1,351,000
Depreciation and amortization	118,000	106,000	299,000	266,000
Interest	0	0	0	0
Total costs and expenses	25,101,000	12,075,000	51,990,000	37,578,000
Income (loss) from operations	6,832,000	1,097,000	11,672,000	2,012,000
Non-operating income (loss)	0	0	0	0
Equity Securities, FV-NI, Unrealized Gain (Loss), Total	0	0	0	0
Income (loss) before income taxes	6,832,000	1,097,000	11,672,000	2,012,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain			0	0
Other Segments [Member]
Revenues:
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Other revenues	11,363,000	11,027,000	33,592,000	33,818,000
Government Assistance Stimulus Income CARES Act	0	0	0	0
Net operating revenues and grant income	11,363,000	11,027,000	33,592,000	33,818,000
Costs and expenses:
Salaries, wages, and benefits	10,146,000	11,109,000	35,807,000	27,617,000
Other operating	2,736,000	2,510,000	8,060,000	7,775,000
Operating Lease, Expense	1,441,000	1,495,000	4,318,000	4,487,000
Depreciation and amortization	811,000	813,000	2,432,000	2,439,000
Interest	0	(40,000)	0	77,000
Total costs and expenses	15,134,000	15,887,000	50,617,000	42,395,000
Income (loss) from operations	(3,771,000)	(4,860,000)	(17,025,000)	(8,577,000)
Non-operating income (loss)	3,399,000	6,478,000	15,245,000	18,870,000
Equity Securities, FV-NI, Unrealized Gain (Loss), Total	(23,797,000)	(241,000)	(23,227,000)	(40,580,000)
Income (loss) before income taxes	$ (24,169,000)	$ 1,377,000	70,195,000	(28,579,000)
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain			$ 95,202,000	$ 1,708,000