Note 13 - Leases - Operating Leases Balance Sheet Information (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Noncurrent operating lease liabilities		$ 649	$ 595	$ 0
Other Noncurrent Assets [Member]
Other noncurrent assets	[1]	1,178
Accrued and Other Current Liabilities [Member]
Accrued and other current liabilities		529
Other Noncurrent Liabilities [Member]
Noncurrent operating lease liabilities		649
Other Liabilities [Member]
Total liabilities		$ 1,178

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