Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Jun. 30, 2021 |
Jun. 30, 2020 |
Jun. 30, 2021 |
Jun. 30, 2020 |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Disaggregation of Revenue [Line Items] | ||||||
| Revenue from contracts with customer | $ 100 | |||||
| Recurring Payment (defined below) | $ 635 | $ 0 | 350 | $ 0 | ||
| Total | $ 1,172 | $ 6,399 | 8,318 | 9,960 | 18,975 | 15,223 |
| 3D Printers | ||||||
| Disaggregation of Revenue [Line Items] | ||||||
| Revenue from contracts with customer | 6,313 | 9,300 | 16,965 | 14,589 | ||
| Support Services | ||||||
| Disaggregation of Revenue [Line Items] | ||||||
| Revenue from contracts with customer | $ 1,370 | $ 660 | $ 1,660 | $ 634 | ||
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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 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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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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