Note 16 - Related Party Transactions - Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Rent	$ (6,862)	$ (7,317)	$ (19,847)	$ (19,253)
Pillarstone OP [Member] \| Rent [Member]
Rent	0	(105)	(15)	(471)
Pillarstone OP [Member] \| Property Management Fee Income [Member] \| Management, Transaction, and Other Fees [Member]
Property Management Fee Revenue	$ 0	$ 75	$ 0	$ 359

The aggregate costs of keeping the property in good condition but that do not appreciably prolong the life or increase the value of the property.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

Name:	us-gaap_CostOfPropertyRepairsAndMaintenance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration