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Balance Sheet Details - Other (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Accounts Receivable, Net |  |
Accounts receivable | $ 17,196 | $ 14,800
Less allowance for doubtful accounts | (494) | (495)
Accounts receivable, net | 16,702 | 14,305
Inventory |  |
Finished goods | 3,047 | 2,014
Work in process | 2,656 | 2,105
Raw materials | 2,679 | 2,725
Total inventory | 8,382 | 6,844
Accrued Liabilities |  |
Accrued contract payments (see Note 5) | 1,025 | 823
Accrued sales commissions | 382 | 1,641
Accrued clinical study payments | 783 | 1,167
Accrued bonuses | 4,863 | 6,122
Accrued vacation benefits | 1,731 | 1,382
Accrued Employee Stock Purchase Plan deductions | 491 | 4
Other accrued liabilities | 3,786 | 2,772
Total accrued liabilities | $ 13,061 | $ 13,911

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