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Note 3 - Balance Sheet Components - Summary of Balance Sheet Amounts (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025 | Mar. 31, 2025
--- | --- | --- | ---
Cash | $ 4,811 | $ 5,896 |
Cash equivalents | 4,410 | 917 |
Cash and cash equivalents | 9,221 | 6,813 |
Restricted cash included in other long-term assets | 7 | 7 |
Cash restricted cash and cash equivalents | 9,228 | 6,820 |
Inventories: |  |  |
Finished goods | 1,783 | 1,809 |
Raw materials | 188 | 238 |
Inventory net | 1,971 | 2,047 |
Other assets: |  |  |
Refundable deposits and other | 475 | 489 |
Other Assets, Noncurrent | 1,976 | 1,923 |
Other accrued expenses: |  |  |
Sales returns | 74 | 100 |
Employee-related expense | 535 | 613 |
Warehousing, inventory-related and other | 625 | 725 |
Accrued Liabilities, Current | 1,234 | 1,438 |
Deferred revenue: |  |  |
Deferred revenue | 5,001 | 5,574 |
Unshipped Product [Member] |  |  |
Deferred revenue: |  |  |
Deferred revenue | 3,511 | 4,063 |
Auto ship advances [Member] |  |  |
Deferred revenue: |  |  |
Deferred revenue | 1,490 | 1,511 |
Software, In-Development [Member] |  |  |
Other assets: |  |  |
Capitalized software implementation costs | $ 1,501 | $ 1,434 | $ 1,400

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