Note 5 - Carrying Value of Goodwill by Reportable Segments (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2020	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill	$ 76,000,000	$ 76,000,000		$ 76,000,000
Accumulated impairment losses	(64,000,000)	(64,000,000)		(64,000,000)
Impairment	0	0	$ 0	0
Balance	12,000,000	12,000,000	12,000,000	12,000,000
Balance			12,000,000	12,000,000
Goodwill			76,000,000
Accumulated impairment losses			(64,000,000)
Traditional Printing [Member]
Goodwill [Line Items]
Goodwill	56,000,000	56,000,000		56,000,000
Accumulated impairment losses	(56,000,000)	(56,000,000)		(56,000,000)
Goodwill			56,000,000
Accumulated impairment losses			(56,000,000)
Digital Printing [Member]
Goodwill [Line Items]
Goodwill	6,000,000	6,000,000		6,000,000
Impairment			0
Balance	6,000,000	6,000,000	6,000,000	6,000,000
Balance			6,000,000	6,000,000
Goodwill			6,000,000
Advanced Materials and Chemicals [Member]
Goodwill [Line Items]
Goodwill	14,000,000	14,000,000		14,000,000
Accumulated impairment losses	(8,000,000)	(8,000,000)		(8,000,000)
Impairment			0
Goodwill reallocation				(6,000,000)
Balance	$ 6,000,000	$ 6,000,000		6,000,000
Goodwill			8,000,000
Accumulated impairment losses			(8,000,000)
Brand [Member]
Goodwill [Line Items]
Impairment			0
Goodwill reallocation				6,000,000
Balance			6,000,000
Balance			6,000,000	$ 6,000,000
Goodwill			$ 6,000,000