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Note 3 - Balance Sheet Components - Summary of Balance Sheet Amounts (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Cash | $ 7,187 | $ 7,925
Cash equivalents | 3,347 | 5,608
Cash and cash equivalents | 10,534 | 13,533
Restricted cash | 37 | 34
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation | 10,571 | 13,567
Inventories: |  |
Finished goods | 2,300 | 2,770
Raw materials | 469 | 502
Inventory, Net | 2,769 | 3,272
Other accrued expenses: |  |
Sales returns | 69 | 85
Employee-related expense | 630 | 656
Warehousing, inventory-related and other | 638 | 684
Accrued Liabilities, Current | 1,337 | 1,425
Deferred revenue: |  |
Deferred revenue | 6,078 | 6,428
Unshipped Product [Member] |  |
Deferred revenue: |  |
Deferred revenue | 4,603 | 4,940
Auto ship advances [Member] |  |
Deferred revenue: |  |
Deferred revenue | $ 1,475 | $ 1,488

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