Note 9 - Income Taxes (Details Textual) - USD ($)	1 Months Ended		3 Months Ended		12 Months Ended
	Apr. 30, 2019	Mar. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2021
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability			$ 2,700,000	$ (1,200,000)
Income Tax Expense (Benefit), Continuing Operations, Adjustment to Per Diluted Share			$ 0.12	$ 0.06
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					21.00%	21.00%	35.00%
Tax Cuts and Jobs Act, Income Tax Expense (Benefit), Total							$ 5,900,000
Deferred Tax Assets, Valuation Allowance, Total					$ 121,000	$ 2,355,000
Operating Loss Carryforwards, Total					$ 64,700,000
Open Tax Year					2016 2017 2018 2019
Forecast [Member]
Unrecognized Deferred Tax Asset that Would Impact Income Tax Expense (Benefit)								$ 200,000
State and Local Jurisdiction [Member] | Kentucky Department of Revenue [Member]
Franchise Tax as Percent of Net Capital		1.10%
Average Franchise Tax Over Two Year-end Periods		$ 2,500,000
State Corporate Income Tax as Percent of Earnings Before Income Tax Expense	50.00%	5.00%