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Significant Accounting Policies - Additional Information (Detail) shares in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 16, 2021 USD ($) | Jun. 30, 2021 shares | Jun. 30, 2020 shares | Jun. 30, 2021 Segment shares | Jun. 30, 2020 shares
Accounting Policy [Line Items] |  |  |  |  |
Number of operating segment | Segment |  |  |  | 1 |
Anti-dilutive shares outstanding | shares |  | 11.4 | 9.2 | 9.4 | 9.0
Description of payment term |  |  |  | The period between the transfer of control of the promised goods and when the Company receives payment is based on 60-day payment terms. |
Description of sales return |  |  |  | Distributors can request to return product to the Company only due to quality issues or for product purchased within one year prior to the product’s expiration date. |
AstraZeneca Agreements [Member] |  |  |  |  |
Accounting Policy [Line Items] |  |  |  |  |
Profit share percent |  |  |  | 50.00% |
HiFiBiO Agreement [Member] |  |  |  |  |
Accounting Policy [Line Items] |  |  |  |  |
Initial upfront payment | $ 25,000,000.0 |  |  |  |
Maximum additional future option, clinical, regulatory, and commercial milestone payments | 1,100,000,000 |  |  |  |
Contingent consideration | $ 0 |  |  |  |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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