Note 2 - Adoption of New Accounting Standard - Cumulative Effect of Adjustments for New Accounting Pronouncements on Consolidated Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2019		Jan. 01, 2019		Dec. 31, 2018
Other noncurrent assets	$ 2,026		$ 3,281		$ 2,146
Accrued and other current liabilities	21,680		28,706
Noncurrent operating lease liabilities	649		595		0
Previous Accounting Guidance [Member]
Other noncurrent assets	848				2,146
Accrued and other current liabilities	21,151				28,166
Noncurrent operating lease liabilities	0				$ 0
Adjustments for New Accounting Pronouncement [Member]
Other noncurrent assets	1,178	[1]	1,135	[2]
Accrued and other current liabilities	529		540
Noncurrent operating lease liabilities	$ 649		$ 595

[1] Operating lease assets balance at December 31, 2019.

[2] Operating lease assets balance at January 1, 2019.