Note 4 - Real Estate Under Development - Costs Incurred for Real Estate Development (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Property Under Development	[1]	$ 220,170	$ 241,384
Dania Pointe [Member]
Property Under Development	[2]	220,170	152,111
Mill Station [Member]
Property Under Development	[3]	0	55,771
Promenade at Christiana [Member]
Property Under Development	[4]	$ 0	$ 33,502

[1] Includes capitalized costs of interest, real estate taxes, insurance, legal costs and payroll of $21.3 million and $24.9 million, as of December 31, 2019 and 2018, respectively.

[2] During 2019, the Company sold a land parcel at this development project for a sales price of $32.5 million, which resulted in a gain of $4.3 million, which is included in Gain on sale of operating properties/change in control of interests on the Company’s Consolidated Statements of Income.

[3] During 2019, this development project, aggregating $80.5 million (including capitalized costs of $9.2 million), was placed in service and primarily reclassified to Land and Building and improvements on the Company's Consolidated Balance Sheets.

[4] During 2019, the Company reclassified this project to Land and Building and improvements on the Company's Consolidated Balance Sheets, as a result of the Company's intention to discontinue development of this project and to market it for sale as is. The as is value, estimated fair value, was below the carrying value and as such, the Company recorded an impairment charge of $11.5 million during the year ended December 31, 2019.