Note 2 - Significant Accounting Policies - Interest Rate Swap Agreements (Details) $ in Millions	Sep. 28, 2019 USD ($)
Interest Rate Swap Maturing May 10, 2021 [Member]
Notional amount	$ 10
Fixed LIBOR Rate	1.99%
Interest Rate Swap Maturing July 25, 2023 [Member]
Notional amount	$ 20
Fixed LIBOR Rate	3.18%

Nominal or face amount used to calculate payment on derivative.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant