Balance Sheet Components - Summary of Depreciation and Amortization Expense of Rental Equipment and Other Property and Equipment (Details) - USD ($) $ in Thousands |
3 Months Ended | |
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Mar. 31, 2019 |
Mar. 31, 2018 |
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| Property Plant And Equipment [Line Items] | ||
| Depreciation | $ 1,705 | $ 2,165 |
| Depreciation and amortization | 2,466 | 2,695 |
| Rental equipment | ||
| Property Plant And Equipment [Line Items] | ||
| Depreciation | 1,705 | 2,165 |
| Other property and equipment | ||
| Property Plant And Equipment [Line Items] | ||
| Depreciation and amortization | $ 761 | $ 530 |
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- Definition Amount of expense for allocation of cost of tangible asset over its useful life directly used in production of good and rendering of service. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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