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Commitments and Contingencies - Additional Information (Detail) | 1 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Nov. 30, 2017 USD ($) | May 31, 2017 USD ($) | Sep. 30, 2021 USD ($) Vehicle | Nov. 30, 2020 $ / shares shares | Aug. 31, 2019 $ / shares shares | Jul. 01, 2013 USD ($)
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Supply Agreement expiration period |  |  | Dec. 31, 2027 |  |  |
Supply Agreement renewal period |  |  | 2 years |  |  |
Master Lease Agreement with Enterprise | Vehicle Leases |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Number of vehicle leases retired | Vehicle |  |  | 50 |  |  |
Number of vehicle leases replaced | Vehicle |  |  | 37 |  |  |
Number of vehicle leases | Vehicle |  |  | 76 |  |  |
Operating lease rent expenses |  |  | $ 100,000 |  |  |
Gain or loss recorded for leases removed |  |  | 0 |  |  |
Operating lease, right-of-use asset |  |  | 500,000 |  |  |
Operating lease, liability |  |  | 500,000 |  |  |
Cost of Goods Sold |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Payment of long term purchase commitment, amendment fees |  |  | 2,000,000.0 |  |  |
MidCap Credit Facility |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Warrants to purchase common stock | shares |  |  |  | 111,853 | 1,171,614 |
Exercise price of warrants | $ / shares |  |  |  | $ 2.91 | $ 1.11 |
Deerfield | Milestone Rights Liability |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Contingent liability remain payable |  |  | 65,000,000.0 |  |  |
Accrued expenses and other current liabilities |  |  | 1,100,000 |  |  |
Milestone rights liability |  |  | $ 4,800,000 |  |  |
Deerfield | Milestone Rights Liability | Maximum |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Contingent liability for milestone payments |  |  |  |  |  | $ 90,000,000.0
Russell Ranch Road II LLC | Office Lease |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Operating lease rent expenses | $ 35,969 | $ 40,951 |  |  |  |
Percentage of annual increase in lease payment | 3.00% | 3.00% |  |  |  |
Lease expiration | 2023-01 | 2023-01 |  |  |  |
Lease renewal option | 5 years | 5 years |  |  |  |
Reimbursement amount received for tenant improvements | $ 56,325 |  |  |  |  |

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