Note 4 - Real Estate Under Development (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Real Estate Under Development, Capitalized Costs of Interest, Real Estate Taxes, Insurance, Legal Costs and Payroll	$ 27.6	$ 24.9
Real Estate Inventory, Capitalized Interest Costs Incurred	1.9
Real Estate Development Projects, Real Estate Taxes and Insurance Capitalized	0.3
Real Estate Development Projects, Payroll Costs Capitalized	$ 0.5