Note 21 - 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, 2017	[1]	Sep. 30, 2017	[1]	Jun. 30, 2017	[1]	Mar. 31, 2017	[1]	Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pre-tax (loss)/income from discontinued operations																	$ (2,020)	$ (8,777)	$ 63
Income tax benefit/(expense)																	706	3,130	(22)
(Loss)/income from discontinued operations, net of tax	$ 10		$ 20		$ (94)		$ (1,250)		$ (565)		$ (4,503)		$ (316)		$ (263)		$ (1,314)	$ (5,647)	$ 41

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