Note 21 - Income Taxes - Statutory Income Tax to Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal provision at statutory tax rate* (1)	[1],[2]	$ (2,490)	$ (520)	$ (47,155)
State and local provision, net of federal benefit (2)	[3]	(386)	(1,072)	(3,498)
Total tax provision – U.S.		$ (2,876)	$ (1,592)	$ (50,653)

[1] Federal statutory tax rate of 21% for the year ended December 31, 2018 and federal statutory tax rate of 35% for the years ended December 31, 2017 and 2016.

[2] The year ended December 31, 2016, includes a $55.6 million charge related to the recording of a deferred tax valuation allowance.

[3] The year ended December 31, 2016, includes a $7.9 million charge related to the recording of a deferred tax valuation allowance.