Commitments and Contingencies - Concentrations (Details) |
12 Months Ended |
|---|---|
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Dec. 31, 2018
item
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| Vendor | |
| Concentrations | |
| Number of products from which revenue is derived | 4 |
| X | ||||||||||
- Definition Represents the number of products from which revenue is derived by the entity. No definition available.
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| X | ||||||||||
- 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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| X | ||||||||||
- Details
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