Personnel Costs - Additional Information (Details) - USD ($) |
12 Months Ended | |
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Dec. 31, 2019 |
Dec. 31, 2018 |
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| Schedule Of Personnel Cost Allocation [Line Items] | ||
| Personnel costs | $ 12,648,000 | $ 15,154,000 |
| Collective Italian National Labor Agreement | ||
| Schedule Of Personnel Cost Allocation [Line Items] | ||
| Percentage of employees subject to agreement | 30.00% | |
| Agreement expiration date | Dec. 31, 2023 | |
| RSUs compensation | ||
| Schedule Of Personnel Cost Allocation [Line Items] | ||
| Personnel costs | $ 996,000 | |
| Stock-Based Compensation | ||
| Schedule Of Personnel Cost Allocation [Line Items] | ||
| Personnel costs | $ 7,400,000 | |
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- Definition Agreement expiration date. No definition available.
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- Definition Percentage of employees subject to agreement. No definition available.
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- Definition Schedule of personnel cost allocation. No definition available.
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- Definition Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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