Note 22 - Discontinued Operations - Reconciliation of the Pre-tax Loss on Discontinued Operations to the Net Loss on Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2018	[1]	Sep. 30, 2018	[1]	Jun. 30, 2018	[1]	Mar. 31, 2018	[1]	Dec. 31, 2017	[1]	Sep. 30, 2017	[1]	Jun. 30, 2017	[1]	Mar. 31, 2017	[1]	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Discontinued Operations And Disposal Groups [Abstract]
Pre-tax loss from discontinued operations																	$ (971)	$ (2,020)	$ (8,777)
Income tax benefit																	180	706	3,130
Loss from discontinued operations, net of tax	$ (81)		$ (86)		$ (433)		$ (191)		$ 10		$ 20		$ (94)		$ (1,250)		$ (791)	$ (1,314)	$ (5,647)

[1] Discontinued operations include charges and reimbursements for environmental remediation related to sites of divested businesses