Cover - shares	3 Months Ended
	Mar. 31, 2024	Apr. 26, 2024
Cover [Abstract]
Entity Registrant Name	Atrion Corporation
Entity Central Index Key	0000701288
Document Type	10-Q
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Small Business	false
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Document Period End Date	Mar. 31, 2024
Entity Filer Category	Large Accelerated Filer
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2024
Entity Common Stock Shares Outstanding		1,759,954
Entity File Number	001-32982
Entity Incorporation State Country Code	DE
Entity Tax Identification Number	63-0821819
Entity Address Address Line 1	One Allentown Parkway
Entity Address City Or Town	Allen
Entity Address State Or Province	TX
Entity Address Postal Zip Code	75002
City Area Code	972
Local Phone Number	390-9800
Security 12b Title	Common stock, Par Value $0.10 per share
Trading Symbol	ATRI
Security Exchange Name	NASDAQ
Document Quarterly Report	true
Entity Interactive Data Current	Yes
Document Transition Report	false