Note 14 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%	21.00%
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 600	$ 500	$ 1,200	$ 500
Deferred Income Tax Liabilities, Net, Total	26,503		26,503		$ 27,555
Deferred Tax Liabilities, Expiration Of Operating Loss Carryforwards	7,600		7,600		7,600
Deferred Tax Liabilities, Land and Indefinite Lived Intangible Assets	22,000		22,000		21,900
Deferred Tax Asset, Interest Carryforward	2,500		2,500		1,300
Deferred Tax Assets, State Taxes	600		600		600
Unrecognized Tax Benefits, Ending Balance	100		100		1,400
Income Tax Examination, Penalties and Interest Expense, Total	1,500	$ 100	1,500	$ 100
Income Tax Examination, Penalties and Interest Accrued, Total	$ 100		$ 100		$ 1,600