Leases - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Loss Contingencies [Line Items]
Agreement Threshold		$ 344,000	$ 994,000
Birmingham, Alabama
Loss Contingencies [Line Items]
Security deposit	$ 268,000	268,000	$ 268,000
New York [Member]
Loss Contingencies [Line Items]
Lease expiration month and year	2027-03
Office Building | Birmingham, Alabama
Loss Contingencies [Line Items]
Operating lease, term of contract				63 months
Operating lease, option to extend				option to extend five years
Operating lease, existence of option to extend				true
Laboratory | Birmingham, Alabama
Loss Contingencies [Line Items]
Operating lease, term of contract				63 months
Operating lease, option to extend				option to extend five years
Operating lease, existence of option to extend				true
Maximum
Loss Contingencies [Line Items]
Agreement Threshold	$ 4,000,000.0
Equipment
Loss Contingencies [Line Items]
Leaseback transaction, description			Company had completed the sale and leaseback for four pieces of equipment and is leasing three other items directly from the leasing company. The terms of the leases are three years and afterwards provide for either annual extensions or an outright purchase of the equipment.
Security deposit	100,000	100,000	$ 100,000	$ 100,000
Equipment | Maximum
Loss Contingencies [Line Items]
Amount held for equipment purchases	$ 1,400,000	$ 1,400,000	$ 1,400,000