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Property, Plant and Equipment - Depreciation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Depreciation Expense [Line Items] |  |  |  |
Total depreciation expense | $ 4,469 | $ 3,157 | $ 12,983 | $ 9,537
Cost of revenue |  |  |  |
Depreciation Expense [Line Items] |  |  |  |
Total depreciation expense | 2,976 | 2,284 | 8,947 | 6,958
Research and development |  |  |  |
Depreciation Expense [Line Items] |  |  |  |
Total depreciation expense | 296 | 197 | 829 | 441
Sales and marketing |  |  |  |
Depreciation Expense [Line Items] |  |  |  |
Total depreciation expense | 32 | 30 | 90 | 90
General and administrative |  |  |  |
Depreciation Expense [Line Items] |  |  |  |
Total depreciation expense | $ 1,165 | $ 646 | $ 3,117 | $ 2,048

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- Definition [Line Items] for Depreciation Expense [Table] + References No definition available. + Details
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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