Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2020	Aug. 04, 2020
Document And Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2020
Entity File Number	001-33368
Entity Registrant Name	Glu Mobile Inc
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	91-2143667
Entity Address, Address Line One	875 Howard Street, Suite 100
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94103
City Area Code	415
Local Phone Number	800-6100
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	GLUU
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		170,853,481
Entity Central Index Key	0001366246
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false