Note 7 - Leases (Details Textual)	1 Months Ended
	Nov. 30, 2003	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	May 13, 2019 USD ($)	Jan. 01, 2019 USD ($)
Operating Lease, Liability, Total		$ 1,399,000	$ 1,466,000
Operating Lease, Weighted Average Remaining Lease Term (Year)		3 years 73 days
Operating Lease, Right-of-Use Asset		$ 1,399,000	$ 1,466,000
Operating Lease, Weighted Average Discount Rate, Percent		5.01%	5.01%
Lessee, Finance Lease, Term of Contract (Year)	10 years
Number of Consecutive Renewal Term Options	4
Lessee, Finance Lease, Renewal Term (Year)	10 years
Lessee, Finance Lease, Annual Rent		$ 15,000
Leasehold Improvements Required to be Made Per Year		$ 150,000
Lessee, Finance Lease, Remaining Lease Term (Year)		33 years 219 days
Finance Lease, Weighted Average Remaining Lease Term (Year)		2 years 73 days
Finance Lease, Weighted Average Discount Rate, Percent		5.20%	5.20%
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)			1 year
Minimum [Member] | Golf and Related Operations [Member]
Lessee, Finance Lease, Remaining Lease Term (Year)		1 year
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)			5 years
Maximum [Member] | Golf and Related Operations [Member]
Lessee, Finance Lease, Remaining Lease Term (Year)		5 years
New Castle Country Club [Member]
Operating Lease, Liability, Total				$ 126,000	$ 1,700,000
Operating Lease, Right-of-Use Asset				$ 126,000
New Castle Country Club [Member] | Vehicles [Member]
Operating Lease, Liability, Total			$ 194,000
Lessee, Operating Lease, Remaining Lease Term (Year)				3 years
Operating Lease, Right-of-Use Asset		$ 194,000