Note 5 - Other Assets - Schedule of Other Assets, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Assets Unclassified [Abstract]
Prepaid assets and deposits	$ 1,799	$ 1,662
Straight-line rent receivable	1,177	885
Right-of-use assets, net	945	1,287
Pre-acquisition costs	293	519
Other receivables, net of allowance of $78 and $82	181	59
Corporate property, net	76	107
Receivables due from related parties	42	206
Lease incentives	8	12
Interest rate cap asset	1	1
Total	$ 4,522	$ 4,738