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, 2020	Dec. 31, 2019
Goodwill [Line Items]
Goodwill				$ 76,000,000
Accumulated impairment losses				(64,000,000)
Balance	$ 12,000,000	$ 12,000,000	$ 12,000,000	12,000,000
Impairment	0	0	0	0
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
Accumulated impairment losses				(56,000,000)
Impairment				0
Goodwill			56,000,000
Accumulated impairment losses			(56,000,000)
Digital Printing [Member]
Goodwill [Line Items]
Goodwill				6,000,000
Balance	6,000,000	6,000,000	6,000,000	6,000,000
Impairment				0
Balance			6,000,000	6,000,000
Goodwill			6,000,000
Advanced Materials and Chemicals [Member]
Goodwill [Line Items]
Goodwill				14,000,000
Accumulated impairment losses				(8,000,000)
Balance	$ 6,000,000	$ 6,000,000	6,000,000	6,000,000
Impairment				0
Balance				6,000,000
Goodwill reallocation			(6,000,000)
Goodwill			8,000,000
Accumulated impairment losses			(8,000,000)
Brand [Member]
Goodwill [Line Items]
Impairment				$ 0
Balance			6,000,000
Goodwill reallocation			6,000,000
Goodwill			$ 6,000,000