Cover Page - shares	3 Months Ended
	Mar. 31, 2021	May 11, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	001-35376
Entity Registrant Name	OBLONG, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0312442
Entity Address, Address Line One	25587 Conifer Road
Entity Address, Address Line Two	Suite 105-231
Entity Address, City or Town	Conifer
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80433
City Area Code	303
Local Phone Number	640-3838
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	OBLG
Amendment Flag	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Central Index Key	0000746210
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		26,616,048
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Security Exchange Name	NASDAQ