Note 12 - Federal and State Income Taxes (Details Textual) - USD ($)		3 Months Ended	12 Months Ended
	Dec. 21, 2017	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%		21.00%	21.00%	34.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		$ 29,300,000
Income Taxes Receivable			$ 607,000
Deferred Tax Assets, Tax Credit Carryforwards, General Business				$ 988,000
Operating Loss Carryforwards, Total			66,805,000
Operating Loss Carryforwards, To Expire			30,835,000
Income Tax Examination, Penalties and Interest Expense, Total			$ 0	$ 0
Statute of Limitations			3 years