Document and Entity Information - shares	3 Months Ended
	Sep. 30, 2019	Nov. 08, 2019
Cover [Abstract]
Entity Registrant Name	LANTRONIX INC
Entity Central Index Key	0001114925
Document Type	10-Q
Document Period End Date	Sep. 30, 2019
Amendment Flag	false
Current Fiscal Year End Date	--06-30
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		23,063,077
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2020
Entity Shell Company	false
Entity Small Business	true
Entity Emerging Growth	false
Entity Ex Transition Period	false
Entity Interactive Data Current	Yes
Entity File Number	001-16027
Entity Incorporation State Code	DE