Note 4 - Concentration of Credit Risk	9 Months Ended
Sep. 30, 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 three and nine months ended September 30, 2021 and 2020. At September 30, 2021, accounts receivable from one distributor exceeded 10% of the Company's total accounts receivable. Total receivables related to this distributor were $7.1 million as of September 30, 2021. No customer made up more than 10% of accounts receivable at December 31, 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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