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Commitments and Contingencies - Additional Information (Detail)	1 Months Ended			3 Months Ended
	Aug. 31, 2019 $ / shares shares	Nov. 30, 2017 USD ($)	May 31, 2017 USD ($)	Mar. 31, 2021 USD ($) Vehicle	Nov. 30, 2020 $ / shares shares	Jul. 01, 2013 USD ($)
Commitments And Contingencies [Line Items]
Purchase obligation extended term	2026
Supply Agreement expiration period				Dec. 31, 2026
Supply Agreement renewal period				2 years
Lease Agreement with Enterprise | Vehicle Leases
Commitments And Contingencies [Line Items]
Number of vehicle leases | Vehicle				88
Operating lease rent expenses				$ 69,000
Gain or loss recorded for leases removed				0
MidCap Credit Facility
Commitments And Contingencies [Line Items]
Warrants to purchase common stock | shares	1,171,614				111,853
Exercise price of warrants | $ / shares	$ 1.11				$ 2.91
Deerfield | Milestone Rights Liability
Commitments And Contingencies [Line Items]
Contingent liability remain payable				70,000,000.0
Accrued expenses and other current liabilities				1,300,000
Milestone rights and other liabilities				$ 5,900,000
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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