Note 21 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Net operating losses (1)	[1]	$ 20,917	$ 20,947
Tax credit carryforwards (2)	[2]	2,340	6,064
Capital loss carryforwards		2,270	2,270
Related party deferred losses		619	619
Charitable contribution carryforwards		23	23
Valuation allowance		(42,703)	(45,413)
Total deferred tax assets		13,084	13,375
Deferred tax liabilities		(12,844)	(12,768)
Net deferred tax assets		240	607
Domestic Tax Authority [Member]
Deferred tax assets:
Tax/GAAP basis differences		$ 29,618	$ 28,865

[1] Expiration dates ranging from 2021 to 2032.

[2] Expiration dates ranging from 2027 to 2035 and tax year 2018 includes alternative minimum tax credit carryovers of $3.5 million that did not expire. The alternative minimum tax credits were recognized in 2019.