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Commitments and Contingencies - Additional Information (Details) - USD ($)
9 Months Ended
Oct. 01, 2021
Jun. 22, 2021
Jan. 08, 2021
Sep. 30, 2021
Sep. 30, 2020
Recorded Unconditional Purchase Obligation [Line Items]          
Lessee, operating lease, term of contract       12 months  
Lessee, operating lease, existence of option to extend [true false]       true  
Lessee, operating lease, option to extend       The Charlottesville Lease has a term of 12 months and is renewable for four additional one-year periods.  
Lessee, operating lease, renewal term       1 year  
Minimum lease payment       $ 785,000  
Lessee, operating lease, discount rate       8.95%  
Rent expense       $ 170,000 $ 177,000
Lorem Vascular Pte Ltd [Member]          
Recorded Unconditional Purchase Obligation [Line Items]          
Compensatory damages and operational   $ 6,000,000      
Pre-clinical Research Study Obligations [Member]          
Recorded Unconditional Purchase Obligation [Line Items]          
Contractual obligation       0  
Pre-clinical Research Study Obligations [Member] | Lorem Vascular Pte Ltd [Member]          
Recorded Unconditional Purchase Obligation [Line Items]          
Litigation settlement, expense       0  
Charlottesville [Member]          
Recorded Unconditional Purchase Obligation [Line Items]          
Minimum lease payment       $ 30,000  
Annual increase in lease rate       3.00%  
Lease commencement date       Apr. 01, 2021  
Piramal Pharma Solutions, Inc. [Member]          
Recorded Unconditional Purchase Obligation [Line Items]          
Master service agreement date     Jan. 08, 2021    
Master services agreement initial term     5 years    
Master services agreement terms, Description     The MSA has a term of five years and will automatically renew for successive one-year terms unless either party notifies the other no later than six months prior to the original term or any additional terms of its intention to not renew the MSA.  The Company has the right to terminate the MSA for convenience upon thirty days’ prior written notice.    
San Antonio, Texas [Member]          
Recorded Unconditional Purchase Obligation [Line Items]          
Operating leases expiry period 2025-02        
Operating lease increase annual minimum lease payments 3.00%        
San Antonio, Texas [Member] | Office Laboratory and Storage Space [Member]          
Recorded Unconditional Purchase Obligation [Line Items]          
Operating leases expiry year       2028