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Notes Receivable - Additional Information (Detail)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 14, 2021
USD ($)
May 14, 2021
USD ($)
May 11, 2021
USD ($)
Jan. 03, 2020
USD ($)
$ / shares
Jun. 30, 2022
USD ($)
Jun. 30, 2022
USD ($)
Sep. 30, 2021
Dec. 31, 2021
€ / shares
Jun. 30, 2022
€ / shares
Jun. 30, 2022
USD ($)
$ / shares
Dec. 31, 2021
USD ($)
$ / shares
Jun. 07, 2021
€ / shares
Mar. 08, 2021
USD ($)
Notes Receivable [Line Items]                          
Proceeds from issuance of equity   $ 3,000                      
Short-term notes payable                   $ 228,400      
Issuance of common stock shares par value | (per share)               € 0.10 € 0.10 $ 0.12 $ 0.12 € 0.10  
Term loan impairment loss recognized                   $ 0      
Amended and Restated Loan Agreement [Member]                          
Notes Receivable [Line Items]                          
Loan agreement $ 6,000                        
Term Loan Receivable [Member]                          
Notes Receivable [Line Items]                          
Loans and lease receivable, Outstanding                   5,900      
Interest income         $ 100 $ 200              
Loans Receivable [Member]                          
Notes Receivable [Line Items]                          
Receivables, Maturity description           On May 14, 2021, the Company amended the loan agreement under which the Maturity Date will be the first business day following the first closing of a subscription for additional units if the proceeds from such subscription amount to at least $3.0 million.              
IntelGenx Corp [Member]                          
Notes Receivable [Line Items]                          
Loans receivable, Fixed interest rate               8.00%          
IntelGenx Corp [Member] | Additional Term Loan And March Term Loan [Member]                          
Notes Receivable [Line Items]                          
Payments to acquire notes receivable     $ 500                    
IntelGenx Corp [Member] | March Term Loan Receivable [Member]                          
Notes Receivable [Line Items]                          
Receivable, Face amount                         $ 2,000
IntelGenx Corp [Member] | Additional Term Loan Receivable [Member]                          
Notes Receivable [Line Items]                          
Receivable, Face amount                         $ 500
IntelGenx Corp [Member] | Additional Term Loan Receivable [Member] | Amended and Restated Loan Agreement [Member]                          
Notes Receivable [Line Items]                          
Receivable, Face amount 6,000                        
IntelGenx Corp [Member] | Additional Term Loan Receivable [Member] | First Tranche [Member] | Amended and Restated Loan Agreement [Member]                          
Notes Receivable [Line Items]                          
Receivable, Face amount 3,000                        
IntelGenx Corp [Member] | Additional Term Loan Receivable [Member] | Second Tranche [Member] | Amended and Restated Loan Agreement [Member]                          
Notes Receivable [Line Items]                          
Receivable, Face amount 3,000                        
IntelGenx Corp [Member] | Term Loan Receivable [Member]                          
Notes Receivable [Line Items]                          
Receivable, Face amount $ 8,500                        
Receivables, Maturity terms             120 days            
IntelGenx Corp [Member] | Term Loan Receivable [Member] | Amended and Restated Loan Agreement [Member]                          
Notes Receivable [Line Items]                          
Term loan maturity date Jan. 05, 2024                        
Promissory Note Agreement [Member] | DemeRx [Member]                          
Notes Receivable [Line Items]                          
Debt Instrument, face amount inclusive other payments       $ 1,000                  
DemeRx Note [Member]                          
Notes Receivable [Line Items]                          
Receivables, Maturity terms       5 years                  
Loans and lease receivable, Outstanding                   $ 1,100 $ 1,100    
Interest income         $ 0 $ 0              
Issuance of common stock shares par value | $ / shares       $ 0.0001                  
DemeRx Note [Member] | DemeRx [Member]                          
Notes Receivable [Line Items]                          
Debt Instrument, face amount inclusive other payments       $ 1,000