Note 29 - Discontinued Operations (Details Textual) - USD ($)				12 Months Ended
	Jul. 01, 2019	Apr. 16, 2019	Apr. 08, 2019	Dec. 31, 2020	Dec. 31, 2019	Nov. 01, 2018	Sep. 03, 2013
Discontinued Operations [Line Items]
Disposal group including discontinued operation consideration							$ 325,000,000
Discontinued Operations [Member]
Discontinued Operations [Line Items]
Earnings from discontinued operation associated with business disposal				$ 3,000,000
Flexographic Packaging Segment [Member] | Stock and Asset Purchase Agreement (SAPA) [Member]
Discontinued Operations [Line Items]
Disposal group including discontinued operation consideration allocated to deferred revenue for brand license			$ 10,000,000
Discontinued operations, divested business right to use period				10 years
Flexographic Packaging Segment [Member] | MIR Bidco, SA [Member] | Stock and Asset Purchase Agreement (SAPA) [Member]
Discontinued Operations [Line Items]
Disposal group including discontinued operation consideration			$ 320,000,000
Discontinued operation consideration payment for deferred closing	$ 5,900,000
Disposal group including discontinued operation promissory notes	1,400,000
Disposal group including discontinued operation economic benefit from operation in china	$ 200,000
Gain recognized after-tax on divestiture					$ 212,000,000
Maximum additional cash consideration upon achievement of EBITDA targets under earn-out agreement						$ 35,000,000
Discontinued operation earn out EBITDA targets contingent consideration for 2018						10,000,000
Discontinued operation earn out EBITDA targets contingent consideration for 2019						10,000,000
Discontinued operation earn out EBITDA targets contingent consideration for 2020						$ 15,000,000
Prepayment for services and products		$ 15,000,000
Remaining prepayment balance				$ 0