Note 11 - Variable Interest Entities ("VIE") - Summary of Restricted Assets and VIE Liabilities (Details) $ in Thousands	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Number of consolidated VIEs	24	24
Restricted Assets:
Real estate, net	$ 229,400	$ 229,200
Cash and cash equivalents	5,200	4,400
Accounts and notes receivable, net	2,900	2,100
Other assets	4,000	3,300
Total Restricted Assets	241,538	239,012
VIE Liabilities:
Mortgages and construction loan payable, net	88,000	83,800
Other liabilities	52,800	59,400
Total VIE Liabilities	$ 140,769	$ 143,186
Variable Interest Entity, Unencumbered [Member]
Number of consolidated VIEs	20	20
Variable Interest Entity, Encumbered by Third Party Non-resource Mortgage Debt [Member]
Number of consolidated VIEs	4	4