Note 7 - Leases (Details Textual)	1 Months Ended	3 Months Ended
	Nov. 30, 2003	Mar. 31, 2019 USD ($)	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Operating Lease, Liability, Total		$ 1,631,000
Operating Lease, Right-of-Use Asset		$ 1,631,000
Operating Lease, Weighted Average Remaining Lease Term		3 years 255 days
Operating Lease, Weighted Average Discount Rate, Percent		5.01%
Lessee, Finance Lease, Term of Contract	10 years
Number of Consecutive Renewal Term Options	4
Lessee, Finance Lease, Renewal Term	10 years
Lessee, Finance Lease, Annual Rent		$ 15,000
Leasehold Improvements Required to be Made Per Year		$ 150,000
Finance Lease, Remaining Term Of Contract		34 years 182 days
Finance Lease, Weighted Average Discount Rate, Percent		4.70%		4.70%
Golf and Related Operations [Member]
Finance Lease, Weighted Average Remaining Lease Term		2 years 219 days
Minimum [Member]
Lessee, Operating Lease, Remaining Term Of Contract		1 year
Minimum [Member] | Golf and Related Operations [Member]
Finance Lease, Remaining Term Of Contract		2 years
Maximum [Member]
Lessee, Operating Lease, Remaining Term Of Contract		5 years
Maximum [Member] | Golf and Related Operations [Member]
Finance Lease, Remaining Term Of Contract		5 years
Accounting Standards Update 2016-02 [Member]
Operating Lease, Liability, Total			$ 1,700,000
Operating Lease, Right-of-Use Asset			$ 1,700,000