Note 4 - Restructuring (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Restructuring and Related Costs [Table Text Block]

	Quarter Ended March 31, 2020										Quarter Ended March 31, 2019
	Infrastructure Solutions		Corrosion Protection		Energy Services		Corporate		Total		Infrastructure Solutions		Corrosion Protection			Energy Services		Corporate		Total
Severance and benefit related costs	$	—	$	863	$	—	$	275	$	1,138	$	282	$	170		$	34	$	9	$	495
Contract termination costs		—		54		62		—		116		425		17			—		98		540
Relocation and other moving costs		—		—		34		—		34		51		—			—		—		51
Other restructuring costs (1)		361		979		—		995		2,335		1,744		(211	)		—		247		1,780
Total pre-tax restructuring charges	$	361	$	1,896	$	96	$	1,270	$	3,623	$	2,502	$	(24	)	$	34	$	354	$	2,866

	Quarter Ended March 31, 2020											Quarter Ended March 31, 2019
	Infrastructure Solutions			Corrosion Protection		Energy Services		Corporate		Total (1)		Infrastructure Solutions			Corrosion Protection			Energy Services		Corporate		Total (2)
Cost of revenues	$	17		$	306	$	—	$	—	$	323	$	(25	)	$	99		$	—	$	—	$	74
Operating expenses		449			551		—		381		1,381		1,346			(63	)		—		247		1,530
Restructuring and related charges		—			917		96		275		1,288		758			187			34		107		1,086
Other expense		(105	)		122		—		614		631		423			(247	)		—		—		176
Total pre-tax restructuring charges	$	361		$	1,896	$	96	$	1,270	$	3,623	$	2,502		$	(24	)	$	34	$	354	$	2,866

Schedule of Restructuring Reserve by Type of Cost [Table Text Block]

								Utilized in 2020
	Reserves at December 31, 2019		2020 Charge to Income		Foreign Currency Translation			Cash(1)		Non-Cash		Reserves at March 31, 2020
Severance and benefit related costs	$	4,389	$	1,138	$	(16	)	$	1,973	$	—	$	3,538
Contract termination costs		953		116		(6	)		177		—		886
Relocation and other moving costs		367		34		3			70		—		334
Other restructuring costs		2,379		2,335		(21	)		3,042		463		1,188
Total pre-tax restructuring charges	$	8,088	$	3,623	$	(40	)	$	5,262	$	463	$	5,946

								Utilized in 2019
	Reserves at December 31, 2018		2019 Charge to Income		Foreign Currency Translation			Cash(1)		Non-Cash			Reserves at March 31, 2019
Severance and benefit related costs	$	1,742	$	495	$	(5	)	$	1,102	$	—		$	1,130
Contract termination costs		359		540		3			310		—			592
Relocation and other moving costs		—		51		—			—		—			51
Other restructuring costs		311		1,780		(2	)		1,852		(151	)		388
Total pre-tax restructuring charges	$	2,412	$	2,866	$	(4	)	$	3,264	$	(151	)	$	2,161