Note 4 - Concentration of Credit Risk	12 Months Ended
Dec. 31, 2021
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	4. Concentration of Credit Risk The Company deposits its cash with financial institutions and, at times, such balances may exceed federally insured limits. No customer accounted for more than 10% of revenue for the years ended December 31, 2021, 2020 and 2019, and no customer made up more than 10% of accounts receivable as of December 31, 2021 and 2020.

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-URI http://asc.fasb.org/topic&trid=2134479

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