Note 16 - Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Effective Income Tax Rate Reconciliation, Percent, Total	(30.69%)	17.60%	(19.15%)	19.90%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%	21.00%
TAIWAN, PROVINCE OF CHINA
Deferred Tax Assets, Valuation Allowance, Total	$ 2.8		$ 2.8