Note 3 - Trade Accounts Receivable	12 Months Ended
Dec. 31, 2025
Notes to Financial Statements
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	3. TRADE ACCOUNTS RECEIVABLE Historically, we have experienced a very low level of credit loss, and most of our trade receivables are collected by the due date or within a few days of the due date. Because of the generally short duration from the balance sheet date to the date of collection, our collection rate is not expected to be significantly impacted by events occurring after the balance sheet date. Accounts receivable past due more than 30 days are subject to an interest charge. We did not charge interest on past due accounts during the years ended December 31, 2025 or 2024 because the time past due was not significant, and there was no accrual for such interest charges as of December 31, 2025 or 2024. As of December 31, 2025 and 2024, we determined that no allowance for credit losses or product returns was necessary. Accounts receivable are written off when deemed uncollectible. No accounts receivable were written off during the years ended December 31, 2025 or 2024. Recoveries of accounts receivable previously written off are recorded as income when received. No such recoveries were recorded during the years ended December 31, 2025 or 2024.

Note 3 - Trade Accounts Receivable

12 Months Ended

Dec. 31, 2025

Loans, Notes, Trade and Other Receivables Disclosure [Text Block]

3. TRADE ACCOUNTS RECEIVABLE

Historically, we have experienced a very low level of credit loss, and most of our trade receivables are collected by the due date or within a few days of the due date. Because of the generally short duration from the balance sheet date to the date of collection, our collection rate is not expected to be significantly impacted by events occurring after the balance sheet date.

Accounts receivable past due more than 30 days are subject to an interest charge. We did not charge interest on past due accounts during the years ended December 31, 2025 or 2024 because the time past due was not significant, and there was no accrual for such interest charges as of December 31, 2025 or 2024.

As of December 31, 2025 and 2024, we determined that no allowance for credit losses or product returns was necessary. Accounts receivable are written off when deemed uncollectible. No accounts receivable were written off during the years ended December 31, 2025 or 2024. Recoveries of accounts receivable previously written off are recorded as income when received. No such recoveries were recorded during the years ended December 31, 2025 or 2024.