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Equity Incentive Plans - Additional Information (Detail) - Common Class A - shares | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2020 | Dec. 31, 2019
10x Genomics, Inc. 2012 Stock Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Common stock issuable (in shares) | 11,186,338 |  | 11,186,338 |
2019 Omnibus Incentive Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Common stock issuable (in shares) | 8,007,751 |  | 8,007,751 |
Common stock reserved for issuance (in shares) | 11,000,000 |  | 11,000,000 |
Shares issued in period for previously outstanding awards (in shares) |  |  | 40,999 |
Shares issuable in connection with outstanding awards (in shares) | 2,951,250 |  | 2,951,250 |
2019 Employee Stock Purchase Plan | Employee Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Common stock reserved for issuance (in shares) | 1,881,782 |  | 1,881,782 | 2,000,000
Shares issued in period for previously outstanding awards (in shares) | 118,218 |  |  |
Share-based compensation arrangement percent |  |  | 85.00% |
Common stock purchased under ESPP (in shares) |  | 0 |  | 0

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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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