Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2021	Aug. 13, 2021
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2021
Entity File Number	001-39687
Entity Registrant Name	Roman DBDR Tech Acquisition Corp.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	85-2749902
Entity Address, Address Line One	2877 Paradise Rd. #702
Entity Address, City or Town	Las Vegas
Entity Address State Or Province	NV
Entity Address, Postal Zip Code	89109
City Area Code	650
Local Phone Number	618-2524
Entity Current Reporting Status	No
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	true
Entity Central Index Key	0001823144
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Ex Transition Period	false
Class A common stock
Document Information [Line Items]
Title of 12(b) Security	Class A Common Stock, par value $0.0001 per share
Trading Symbol	DBDR
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		23,156,000
Class B common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		5,789,000
Units
Document Information [Line Items]
Title of 12(b) Security	Units, each consisting of one share of Class A Common Stock and one-half of one Redeemable Warrant
Trading Symbol	DBDRU
Security Exchange Name	NASDAQ
Redeemable Warrants
Document Information [Line Items]
Title of 12(b) Security	Redeemable Warrants, each whole warrant exercisable for one share of Class A Common Stock at an exercise price of $11.50 per share
Trading Symbol	DBDRW
Security Exchange Name	NASDAQ