Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Aug. 01, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	ViewRay, Inc.
Entity Central Index Key	0001597313
Document Type	10-Q
Trading Symbol	VRAY
Document Period End Date	Jun. 30, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		98,480,277
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2019
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-37725
Entity Tax Identification Number	421777485
Entity Address, Address Line One	2 Thermo Fisher Way
Entity Address, City or Town	Oakwood Village
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	44146
City Area Code	(440)
Local Phone Number	703-3210