Note 5 - Other Assets - Schedule of Other Assets, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other Assets Unclassified [Abstract]
Prepaid assets and deposits	$ 1,708	$ 1,662
Right-of-use assets, net	$ 852	$ 1,287
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Total	Total
Straight-line rent receivable	$ 1,398	$ 885
Pre-acquisition costs	280	519
Other receivables, net of allowance of $75 and $82	82	59
Corporate property, net	68	107
Receivables due from related parties	208	206
Lease incentives		12
Interest rate cap asset	3	1
Total	$ 4,599	$ 4,738