Revenue Recognition - Additional Information (Details) - USD ($) $ in Thousands |
9 Months Ended | |
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Sep. 30, 2019 |
Dec. 31, 2018 |
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| Disaggregation of Revenue [Line Items] | ||
| Deferred revenue | $ 3,244 | $ 2,597 |
| Contracts for rental units | $ 509 | |
| Lease term | 12 months | |
| Accounts receivable, net of allowances | $ 5,206 | $ 3,660 |
| Minimum | ||
| Disaggregation of Revenue [Line Items] | ||
| Accounts receivable payment terms | 30 days | |
| Maximum | ||
| Disaggregation of Revenue [Line Items] | ||
| Accounts receivable payment terms | 60 days |
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- Definition Contracts With Customer, Accounts Receivable, Payment Terms, Duration No definition available.
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- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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- Definition Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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