Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2020	Aug. 13, 2020
Entity Registrant Name	DiamondPeak Holdings Corp.
Entity Central Index Key	0001759546
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Type	10-Q
Document Period End Date	Jun. 30, 2020
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2020
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Small Business	true
Entity Shell Company	true
Entity File Number	001-38821
Entity Incorporation State Country Code	DE
Class A Common Stock
Entity Common Stock, Shares Outstanding		28,000,000
Class B Common Stock
Entity Common Stock, Shares Outstanding		7,000,000