Balance Sheet Components - Summary of Depreciation and Amortization Expense of Property and Equipment and Rental Equipment (Details) - USD ($) $ in Thousands |
3 Months Ended | |
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Mar. 31, 2016 |
Mar. 31, 2015 |
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| Property Plant And Equipment [Line Items] | ||
| Depreciation and amortization | $ 3,425 | $ 3,423 |
| Equipment | ||
| Property Plant And Equipment [Line Items] | ||
| Depreciation | 2,947 | 2,956 |
| Other property and equipment | ||
| Property Plant And Equipment [Line Items] | ||
| Depreciation and amortization | $ 478 | $ 467 |
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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://www.xbrl.org/2003/role/presentationRef
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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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