Cover - shares shares in Thousands	6 Months Ended
	Jun. 30, 2022	Aug. 08, 2022
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2022
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--12-31
Entity File Number	000-30351
Entity Registrant Name	DEEP DOWN, INC.
Entity Central Index Key	0001110607
Entity Tax Identification Number	75-2263732
Entity Incorporation, State or Country Code	NV
Entity Address, Address Line One	18511 Beaumont Highway
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77049
City Area Code	(281)
Local Phone Number	517-5000
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		11,888,202