Note 15 - Subsequent Events (Details Textual) $ in Millions	Jan. 23, 2019 USD ($)
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] \| Subsequent Event [Member] \| Marion Can Plant [Member]
Proceeds from Divestiture of Businesses, Net of Cash Divested, Total	$ 3.5

This element represents the cash inflow during the period from the sale of a component of the entity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585

Name:	us-gaap_ProceedsFromDivestitureOfBusinessesNetOfCashDivested
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration