Summary of Significant Accounting Policies - Schedule of Potentially Dilutive Shares (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	21,570,149	22,450,532	21,570,149	22,450,532
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	3,627,583	2,912,307	3,627,583	2,912,307
Outstanding restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	2,693,755	3,151,214	2,693,755	3,151,214
April 2022 Public Offering \| Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	15,000,000	15,000,000	15,000,000	15,000,000
Warrants to purchase common stock associated with Loan Agreement \| Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	198,811	198,811	198,811	198,811
Common stock associated with March 2019 Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	0	1,138,200	0	1,138,200
Warrants to purchase common stock associated with Danforth \| Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	50,000	50,000	50,000	50,000

SCYNEXIS INC 10-Q