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Stockholders' Equity - Schedule of Warrant Activity (Detail)
 9 Months Ended
Sep. 30, 2021
shares
Common Stock Warrants [Member]  
Class Of Warrant Or Right [Line Items]  
Beginning Balance 337,822
Issued 807,809
Exercised 0
Cancelled/Expired 0
Ending Balance 1,145,631
Common Stock Warrants [Member] | Registered Direct Warrants, Placement Agent [Member]  
Class Of Warrant Or Right [Line Items]  
Beginning Balance 9,581
Issued 0
Exercised 0
Cancelled/Expired 0
Ending Balance 9,581
Common Stock Warrants [Member] | Private Placement Warrants [Member]  
Class Of Warrant Or Right [Line Items]  
Beginning Balance 319,064
Issued 0
Exercised 0
Cancelled/Expired 0
Ending Balance 319,064
Common Stock Warrants [Member] | Warrants Exchanged for Common Stock [Member]  
Class Of Warrant Or Right [Line Items]  
Beginning Balance 0
Issued 509,117
Exercised 0
Cancelled/Expired 0
Ending Balance 509,117
Common Stock Warrants [Member] | Private Placement Warrants, Placement Agent [Member]  
Class Of Warrant Or Right [Line Items]  
Beginning Balance 9,177
Issued 0
Exercised 0
Cancelled/Expired 0
Ending Balance 9,177
Common Stock Warrants [Member] | Warrants Exchanged for Preferred Stock Warrants [Member]  
Class Of Warrant Or Right [Line Items]  
Beginning Balance 0
Issued 298,692
Exercised 0
Cancelled/Expired 0
Ending Balance 298,692
Preferred Stock Warrants [Member]  
Class Of Warrant Or Right [Line Items]  
Beginning Balance 55,583.875
Assumed and replaced 0
Exercised 0
Cancelled/Exchanged (5,376.456)
Ending Balance 50,207.419
Preferred Stock Warrants [Member] | Warrants Assumed and Replaced in Acquisition [Member]  
Class Of Warrant Or Right [Line Items]  
Beginning Balance 55,583.875
Assumed and replaced 0
Exercised 0
Cancelled/Exchanged (5,376.456)
Ending Balance 50,207.419