Note 5 - Deferred Costs and Intangible Assets (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amortization of Lease Origination Costs and In-place Lease Intangible Assets	$ 1,240	$ 1,182	$ 1,793
Amortization of Real Estate Abatements	475	1,568	1,476
Above Market Leases [Member]
Amortization of Intangible Assets, Total	$ 235	$ 58	$ 39