v3.20.2

Summary of Significant Accounting Policies and Other Information - Schedule of Inventory, Current (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Inventories |  |  |
Raw materials | $ 104,286 |  | $ 90,677
Work in process | 5,014 |  | 2,007
Finished goods | 22,751 |  | 19,119
Total inventories | 132,051 |  | 111,803
Inventory allowance | (3,224) |  | (2,964)
Inventories, net | 128,827 |  | $ 108,839
Inventory Allowance |  |  |
Balance at beginning of period | 2,964 | $ 5,730 |
Charged to expense | 1,272 | 560 |
Write-offs | (1,012) | (2,027) |
Balance at end of period | $ 3,224 | $ 4,263 |

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