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Note 2 - Allowance for Doubtful Accounts	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Allowance for Credit Losses [Text Block]	Note 2 – Allowance for Doubtful Accounts The allowance for doubtful accounts was $0.4 million at December 31, 2020 and $0.5 million at December 31, 2019.

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- Definition

The entire disclosure for allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-URI http://asc.fasb.org/topic&trid=2196771

+ Details

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- References

No definition available.

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