Note 15 - Income Taxes (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating Loss Carryforwards Expiration Start Year	2032
Unrecognized Tax Benefits, Ending Balance	$ 0
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	11,800
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 10,000