Balance Sheet Components - Summary of Depreciation and Amortization Expense of Rental Equipment and Other Property and Equipment (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
| Property Plant And Equipment [Line Items] | ||||
| Depreciation | $ 1,594 | $ 1,966 | $ 3,299 | $ 4,131 |
| Depreciation and amortization | 2,436 | 2,517 | 4,902 | 5,212 |
| Rental equipment | ||||
| Property Plant And Equipment [Line Items] | ||||
| Depreciation | 1,594 | 1,966 | 3,299 | 4,131 |
| Other property and equipment | ||||
| Property Plant And Equipment [Line Items] | ||||
| Depreciation and amortization | $ 842 | $ 551 | $ 1,603 | $ 1,081 |
| X | ||||||||||
- 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
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- 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.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|