Note 5 - Other Assets - Schedule of Other Assets, Net (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Other Assets, Unclassified [Abstract]
Prepaid assets and deposits	$ 399	$ 1,722
Leasing commission costs and incentives, net	982	751
Right-of-use assets, net	$ 476	$ 695
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Total assets	Total assets
Pre-acquisition costs	$ 6	$ 8
Other receivables, net	56	101
Corporate property, net	52	64
Receivables from related parties	1,170	1,170
Total assets	$ 3,141	$ 4,511