Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2023	Nov. 13, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Document Transition Report	false
Entity File Number	001-40492
Entity Registrant Name	Femasys Inc.
Entity Central Index Key	0001339005
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	11-3713499
Entity Address, Address Line One	3950 Johns Creek Court
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	Suwanee
Entity Address, State or Province	GA
Entity Address, Postal Zip Code	30024
City Area Code	770
Local Phone Number	500-3910
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Title of 12(b) Security	Common stock, $0.001 par value
Trading Symbol	FEMY
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		21,649,623