Commitments and Contingencies - Additional Information (Detail)	1 Months Ended		3 Months Ended	6 Months Ended
	Nov. 30, 2017 USD ($)	May 31, 2017 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2021 USD ($) 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
Lease Agreement with Enterprise | Vehicle Leases
Commitments And Contingencies [Line Items]
Number of vehicle leases remove | Vehicle				10
Number of vehicle leases | Vehicle				78
Operating lease rent expenses				$ 69,000
Gain or loss recorded for leases removed				0
Cost of Goods Sold
Commitments And Contingencies [Line Items]
Payment of long term purchase commitment, amendment fees			$ 2,000,000.0	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	65,000,000.0
Accrued expenses and other current liabilities			1,100,000	1,100,000
Milestone rights liability			$ 4,800,000	$ 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