| Revenue Recognition - Additional Information (Details) - USD ($) $ in Thousands | 6 Months Ended | |
|---|---|---|
| Jun. 30, 2020 | Dec. 31, 2019 | |
| Disaggregation of Revenue [Line Items] | ||
| Deferred revenue | $ 3,051 | $ 3,281 | 
| Non-cancellable backlog | $ 496 | |
| Lease term | 12 months | |
| Accounts receivable, net of allowances | $ 3,741 | $ 5,208 | 
| Minimum | ||
| Disaggregation of Revenue [Line Items] | ||
| Accounts receivable payment terms | 30 days | |
| Maximum | ||
| Disaggregation of Revenue [Line Items] | ||
| Accounts receivable payment terms | 90 days | 
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- Definition Contract With Customer, Liability, Non-Cancellable Backlog No definition available. 
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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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