Note 5 - Other Assets - Schedule of Other Assets, Net (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Other Assets, Unclassified [Abstract]
Prepaid assets and deposits	$ 1,106	$ 1,722
Leasing commission costs, net	901	805
Right-of-use assets, net	$ 586	$ 695
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Total assets	Total assets
Pre-acquisition costs	$ 2	$ 8
Other receivables, net	43	101
Corporate property, net	49	64
Receivables from related parties	1,170	1,170
Total assets	$ 3,857	$ 4,565