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BALANCE SHEET COMPONENTS (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Cash and cash equivalents: |  |  |
Cash and cash equivalents | $ 96,035 | $ 132,653 |
Restricted cash | 3,390 | 2,998 |
Cash, cash equivalents and restricted cash | 99,425 | 135,651 | $ 138,478
Inventories: |  |  |
Finished goods | 6,142 | 11,171 |
Raw materials | 1,249 | 1,145 |
Reserve for obsolescence | (987) | (151) |
Inventories, net | 6,404 | 12,165 |
Property and equipment: |  |  |
Office equipment | 578 | 537 |
Office software | 1,037 | 918 |
Machinery | 28 | 29 |
Furniture and fixtures | 327 | 319 |
Leasehold improvements | 1,001 | 1,022 |
Construction in progress (including internal-use software development costs) | 0 | 19 |
Property and equipment, at cost | 2,971 | 2,844 |
Accumulated depreciation and amortization | (2,236) | (1,910) |
Property and equipment, net | 735 | 934 |
Other accrued expenses: |  |  |
Sales returns | 373 | 801 |
Employee-related expense | 1,258 | 4,051 |
Warehousing, inventory-related and other | 756 | 1,269 |
Other accrued expenses | 2,387 | 6,121 |
Deferred revenue: |  |  |
Deferred revenue | 4,506 | 6,795 |
China |  |  |
Cash and cash equivalents: |  |  |
Cash and cash equivalents | 9,100 |  |
Unshipped product |  |  |
Deferred revenue: |  |  |
Deferred revenue | 2,390 | 4,574 |
Auto ship advances |  |  |
Deferred revenue: |  |  |
Deferred revenue | 1,985 | 1,876 |
Other |  |  |
Deferred revenue: |  |  |
Deferred revenue | 131 | 345 |
Cash |  |  |
Cash and cash equivalents: |  |  |
Cash and cash equivalents | 13,720 | 47,323 |
Cash equivalents |  |  |
Cash and cash equivalents: |  |  |
Cash and cash equivalents | $ 82,315 | $ 85,330 |

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