Note 4 - Real Estate Under Development (Details Textual) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Real Estate Under Development, Capitalized Costs of Interest, Real Estate Taxes, Insurance, Legal Costs and Payroll	$ 30.1	$ 24.9
Real Estate Inventory, Capitalized Interest Costs Incurred	4.1
Real Estate Development Projects, Real Estate Taxes and Insurance Capitalized	0.4
Real Estate Development Projects, Payroll Costs Capitalized	$ 0.7