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Balance Sheet Components | 12 Months Ended
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Dec. 31, 2017
Balance Sheet Components [Abstract] |
Supplemental Balance Sheet Disclosures [Text Block] | BALANCE SHEET COMPONENTS The components of certain balance sheet amounts are as follows (in thousands):
| December 31,
| 2017 |  | 2016
Cash and cash equivalents: |  |  |
Cash | $ | 61,703 |  |  | $ | 52,453 |
Cash equivalents | 73,608 |  |  | 73,468 |
| $ | 135,311 |  |  | $ | 125,921 |
Inventories: |  |  |
Finished goods | $ | 7,779 |  |  | $ | 10,722 |
Raw materials | 799 |  |  | 617 |
Inventory reserve for obsolescence | (180 | ) |  | (82 | )
| $ | 8,398 |  |  | $ | 11,257 |
Property and equipment: |  |  |
Office equipment | $ | 530 |  |  | $ | 517 |
Office software | 916 |  |  | 672 |
Machinery | 30 |  |  | 28 |
Furniture and fixtures | 276 |  |  | 241 |
Leasehold improvements | 957 |  |  | 840 |
Construction in progress (including internal-use software development costs) | 10 |  |  | 157 |
Property and equipment, at cost | 2,719 |  |  | 2,455 |
Accumulated depreciation and amortization | (1,570 | ) |  | (1,067 | )
| $ | 1,149 |  |  | $ | 1,388 |
Other accrued expenses: |  |  |
Sales returns | $ | 614 |  |  | $ | 1,632 |
Employee-related expense | 5,568 |  |  | 10,541 |
Warehousing, inventory-related and other | 1,423 |  |  | 2,816 |
| $ | 7,605 |  |  | $ | 14,989 |
Deferred revenue: |  |  |  |  |
Unshipped product | $ | 2,411 |  |  | $ | 2,191 |
Auto ship advances | 1,665 |  |  | 2,327 |
Enrollment package revenue | 379 |  |  | 430 |
| $ | 4,455 |  |  | $ | 4,948 |
As of December 31, 2017, cash and cash equivalents include $8.7 million held in banks located within China subject to foreign currency controls.

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- Definition Balance Sheet Components [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References No definition available. + Details
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