Note 9 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Intangible assets accumulated amortization	$ 20,333	$ 15,433
Intangible assets, gross	128,563	99,566
Intangible assets, net	108,230	84,133
Tenant Relationship [Member]
Intangible assets not subject to amortization	73,667	73,667
Intangible assets not subject to amortization, net	73,667	73,667
Trade Names [Member]
Intangible assets not subject to amortization	10,314	3,264
Intangible assets not subject to amortization, net	10,314	3,264
Database Rights [Member]
Intangible assets subject to amortization	4,918	4,918
Intangible assets accumulated amortization	4,488	3,997
Intangible assets subject to amortization, net	430	921
Intangible assets subject to amortization, net	430	921
Service Agreements [Member]
Intangible assets subject to amortization	3,680	3,680
Intangible assets accumulated amortization	3,680	3,680
Intangible assets subject to amortization, net	0	0
Intangible assets subject to amortization, net	0	0
Customer Relationships [Member]
Intangible assets subject to amortization	31,645	12,646
Intangible assets accumulated amortization	11,598	7,305
Intangible assets subject to amortization, net	20,047	5,341
Intangible assets subject to amortization, net	20,047	5,341
Leases, Acquired-in-Place [Member]
Intangible assets subject to amortization	3,238	1,125
Intangible assets accumulated amortization	343	281
Intangible assets subject to amortization, net	2,895	844
Intangible assets subject to amortization, net	2,895	844
Above-market Lease [Member]
Intangible assets subject to amortization	835
Intangible assets accumulated amortization	0
Intangible assets subject to amortization, net	835
Intangible assets subject to amortization, net	835
Noncompete Agreements [Member]
Intangible assets subject to amortization	266	266
Intangible assets accumulated amortization	224	170
Intangible assets subject to amortization, net	42	96
Intangible assets subject to amortization, net	$ 42	$ 96