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Commitments - R&D Commitments and Altria Consulting Services (Details) $ in Thousands | Feb. 18, 2019 | Oct. 15, 2018 USD ($) | Sep. 04, 2018 USD ($) cannabinoid shares | Jul. 17, 2018 USD ($)
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Ginkgo | Research and Development Arrangement |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |
Number of cannabinoids targeted to develop scalable and consistent production | cannabinoid |  |  | 8 |
Common shares issuable (up to) (in shares) | shares |  |  | 14,674,903 |
Common shares issuable, value assigned |  |  |  | $ 100,000
Payments subject to milestones |  |  | $ 22,000 |
Technion | Research and Development Arrangement |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |
Payments subject to milestones |  | $ 4,900 |  |
Amount of commitment |  | $ 1,784 |  |
Research funding period |  | 3 years |  |
Altria Ventures | Consulting Services Arrangement |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |
Monthly fee, percentage of direct and indirect service costs | 105.00% |  |  |

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