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Balance Sheet Components | 3 Months Ended
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Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Balance Sheet Components | 4. Balance Sheet Components Inventories The following table shows the components of inventories as of March 31, 2021 and December 31, 2020 (in thousands):
|  | March 31, 2021 |  | December 31, 2020
Raw materials |  | $ | 58,816 |  |  | $ | 45,341 |
Work in process |  | 20,853 |  |  | 22,099 |
Finished goods |  | 165,652 |  |  | 152,087 |
Inventories |  | $ | 245,321 |  |  | $ | 219,527 |
Accrued Liabilities The following table shows the components of accrued liabilities as of March 31, 2021 and December 31, 2020 (in thousands):
|  | March 31, 2021 |  | December 31, 2020
Payroll and employee-related cost |  | $ | 57,234 |  |  | $ | 50,083 |
Accrued expenses |  | 13,213 |  |  | 9,246 |
Sales return provision |  | 1,470 |  |  | 9,812 |
Product warranty |  | 3,314 |  |  | 2,896 |
Other acquisition-related costs(1) |  | 3,000 |  |  | 3,000 |
Other accrued liabilities |  | 11,983 |  |  | 10,758 |
Total accrued liabilities |  | $ | 90,214 |  |  | $ | 85,795 |
(1) Amount consists of a contingent liability related to an anti-dilution provision from the asset acquisition of MVI Health Inc. (“MVI”) in 2018. The following table shows the changes in the Company’s estimated product warranty accrual, included in accrued liabilities, as of March 31, 2021 and December 31, 2020 (in thousands):
|  | March 31, 2021 |  | December 31, 2020
Balance at the beginning of the period |  | $ | 2,896 |  |  | $ | 2,318 |
Accruals of warranties issued |  | 775 |  |  | 1,589 |
Settlements of warranty claims |  | (357) |  |  | (1,011) |
Balance at the end of the period |  | $ | 3,314 |  |  | $ | 2,896 |

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI http://asc.fasb.org/topic&trid=2122208 + Details
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