Note 4 - Real Estate Under Development - Costs Incurred for Real Estate Development (Details) - USD ($) $ in Thousands		Jun. 30, 2018	Dec. 31, 2017
Property Under Development	[1]	$ 529,759	$ 402,518
Grand Parkway Marketplace [Member]
Property Under Development		46,727	43,403
Dania Pointe [Member]
Property Under Development	[2]	218,870	152,841
Mill Station [Member]
Property Under Development		42,085	34,347
Lincoln Square [Member]
Property Under Development	[3]	140,175	90,479
Avenues Walk [Member]
Property Under Development	[3]	48,573	48,573
Promenade at Christiana [Member]
Property Under Development	[4]	$ 33,329	$ 32,875

[1] Includes capitalized costs of interest, real estate taxes, insurance, legal costs and payroll of $36.5 million and $27.7 million, as of June 30, 2018 and December 31, 2017, respectively.

[2] These costs include expenditures for phase I and phase II offsite and infrastructure requirements. During the six months ended June 30, 2018, the Company acquired a parcel adjacent to this development project for a purchase price of $4.6 million.

[3] Mixed-use project to be developed in the future.

[4] Land held for future development.