Note 1 - Organization and Summary of Significant Accounting Policies - Sales Return Reserve (Details) - USD ($) $ in Thousands |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Sales reserve at beginning of period | $ 38 | $ 56 |
| Provision in current period | 323 | 373 |
| Returns charged off against the reserve | 321 | 372 |
| Sales reserve at end of period | $ 40 | $ 57 |