Note 6 - Revolving Line of Credit and Long-term Debt - Five Year Term Loan (Details) (Parentheticals)	Jun. 22, 2020
Term Loan [Member] \| Senior Secured Credit Facility [Member]
Term (Year)	5 years

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration