Note 5 - Other Assets - Schedule of Other Assets, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Prepaid assets and deposits	$ 1,659	$ 1,722
Leasing commission costs and incentives, net	1,728	751
Right-of-use assets, net	$ 375	$ 695
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Total assets	Total assets
Pre-acquisition costs	$ 11	$ 8
Other receivables, net	34	101
Corporate property, net	47	64
Total assets	5,024	4,511
Related Party [Member]
Property, Plant and Equipment [Line Items]
Receivables from related parties	$ 1,170	$ 1,170