Note 17 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Liability for Uncertainty in Income Taxes, Current	$ 0
Deferred Tax Assets, Valuation Allowance, Total	0	$ 0
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	$ 7,900
Earliest Tax Year [Member]
Operating Loss Carryforwards, Expiration Year	2031