Note 9 - Revenues - Summary of Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Rental income	$ 6,938	$ 4,816	$ 13,665	$ 8,754
Sublease income	51		51
Total Out of Scope of Topic 606 revenue	6,989	4,816	13,716	8,754
Total revenues	8,393	5,698	15,695	10,616
Accounting Standards Update 2014-09 [Member]
Disaggregation Of Revenue [Line Items]
Topic 606 Revenue	1,404	882	1,979	1,862
Leasing Commissions [Member] | Accounting Standards Update 2014-09 [Member] | Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Topic 606 Revenue	1,055	477	1,357	1,066
Property and Asset Management Fees [Member] | Accounting Standards Update 2014-09 [Member] | Over Time [Member]
Disaggregation Of Revenue [Line Items]
Topic 606 Revenue	77	149	147	346
Sales Commissions [Member] | Accounting Standards Update 2014-09 [Member] | Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Topic 606 Revenue	226	94	372	140
Development Fees [Member] | Accounting Standards Update 2014-09 [Member] | Over Time [Member]
Disaggregation Of Revenue [Line Items]
Topic 606 Revenue	0	88	0	177
Engineering Services [Member] | Accounting Standards Update 2014-09 [Member] | Over Time [Member]
Disaggregation Of Revenue [Line Items]
Topic 606 Revenue	$ 46	$ 74	$ 103	$ 133