Cover - $ / shares	6 Months Ended
	Jun. 30, 2026	Aug. 14, 2026
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2026
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2026
Current Fiscal Year End Date	--12-31
Entity File Number	0-7092
Entity Registrant Name	RELIABILITY INCORPORATED
Entity Central Index Key	0000034285
Entity Tax Identification Number	75-0868913
Entity Incorporation, State or Country Code	TX
Entity Address, Address Line One	22505 Gateway Center Drive
Entity Address, Address Line Two	P.O. Box 71
Entity Address, City or Town	Clarksburg
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	20871
City Area Code	(202)
Local Phone Number	965-1100
Title of 12(b) Security	Common Stock, no par value
Trading Symbol	RLBY
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		46,707,790
Entity Listing, Par Value Per Share	$ 0