Note 8 - Other Assets - Mortgages Receivable (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019 USD ($)
Mortgage Receivable Paid May 19 [Member]
Amount received	$ 2.0
Interest rate	6.00%
Mortgage Receivable Paid June 19 [Member]
Amount received	$ 1.6
Interest rate	7.57%
Second Mortgage Receivable Paid June 19 [Member]
Amount received	$ 1.6
Interest rate	7.57%