Quarterly report pursuant to Section 13 or 15(d)

Capital Structure - Summary of Common Stock Reserved for Future Issuance (Detail)

v3.21.2
Capital Structure - Summary of Common Stock Reserved for Future Issuance (Detail) - shares
Sep. 30, 2021
Dec. 31, 2020
Class of Stock [Line Items]    
Common Stock reserved for future issuance 13,904,058 14,245,213
Two Thousand Fourteen Omnibus IncentivePlan [Member]    
Class of Stock [Line Items]    
Common Stock reserved for future issuance 26,774 41,079
Stock Options [Member]    
Class of Stock [Line Items]    
Common Stock reserved for future issuance 2,950,551 1,853,841
Warrants [Member]    
Class of Stock [Line Items]    
Common Stock reserved for future issuance 10,926,733 12,350,293