Note 8 - Mortgages and Other Financing Receivables - Mortgages Receivable (Details) $ in Millions	9 Months Ended
	Sep. 30, 2018 USD ($)
Mortgage Receivable Paid Sep-18 [Member]
Amount received	$ 1.8
Interest rate	7.57%
Maturity date	Jun. 30, 2019
Mortgage Receivable Paid Apr-18 [Member]
Amount received	$ 4.5	[1]
Interest rate	7.00%	[1]
Maturity date	May 31, 2018	[1]

[1] This Canadian denominated ("CAD") receivable had an aggregate outstanding balance of CAD 5.7 million (USD $4.5 million) upon payoff.