Note 9 - Significant Customers	3 Months Ended
Mar. 31, 2022
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	9. Significant Customers The Company had no customers that represented over 10% of revenue during either of the three-month periods ended March 31, 2022, or 2021. The Company had one customer that represented 17% and 15% of the total accounts receivable balance as of March 31, 2022, and 2021, respectively.

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 https://asc.fasb.org/topic&trid=2134479

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