Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Effective Income Tax Rate Reconciliation, Percent, Total	42.50%	25.50%
Other Noncurrent Liabilities [Member]
Unrecognized Tax Benefits, Ending Balance			$ 0