Related-Party Transactions - Additional Information (Details) - USD ($) |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2019 |
Dec. 31, 2018 |
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| Related Party Transaction [Line Items] | ||
| Receivables from agreement | $ 6,500,000 | $ 2,489,000 |
| SutroVax | ||
| Related Party Transaction [Line Items] | ||
| Receivables from agreement | $ 14,000 | $ 49,000 |
| Percentage common stock ownership interest | 5.60% | 5.60% |
| Carrying value of common stock under the cost method | $ 0 | $ 0 |
| Sutro Biopharma | Celgene | Maximum [Member] | IPO | ||
| Related Party Transaction [Line Items] | ||
| Equity interest percentage | 10.00% | |
| Sutro Biopharma | Merck | ||
| Related Party Transaction [Line Items] | ||
| Equity interest percentage | 11.90% | 11.90% |
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- Definition Carrying value of common stock. No definition available.
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- Definition Common stock ownership percentage. No definition available.
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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. No definition available.
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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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