Note 6 - Revolving Line of Credit and Long-term Debt - Five Year Term Loan (Details) (Parentheticals) - Term Loan [Member] - Senior Secured Credit Facility [Member] - USD ($) $ in Thousands		6 Months Ended
Jun. 22, 2020	Jun. 30, 2021
Debt issuance costs		$ 552
Term (Year)	5 years	5 years

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399

Name:	us-gaap_DeferredFinanceCostsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant