Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Global Foundries Common Stock	Global Foundries Additional Paid-In Capital	Global Foundries	Common Stock Initial Public Offering	Common Stock Private Placement	Common Stock	Additional Paid-In Capital Initial Public Offering	Additional Paid-In Capital Private Placement	Additional Paid-In Capital	Accumulated Deficit	Initial Public Offering	Private Placement	Total
Balance at Dec. 31, 2013									$ 6,172	$ (51,365)			$ (45,193)
Balance (in shares) at Dec. 31, 2013						2,542,337
Increase (Decrease) in Stockholders' Equity
Issuance of common stock		$ 1	$ 1
Stock issued during period (in shares)	461,538					9,848
Issuance of common stock upon exercise of stock options									41				41
Compensation expense related to vesting of common stock issued to GLOBAL FOUNDRIES									107				107
Stock-based compensation expense									799				799
Net loss										(10,183)			(10,183)
Balance at Dec. 31, 2014									7,120	(61,548)			(54,428)
Balance (in shares) at Dec. 31, 2014						3,013,723
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon exercise of stock options									4				$ 4
Issuance of common stock upon exercise of stock options (in shares)						1,558							1,558
Compensation expense related to vesting of common stock issued to GLOBAL FOUNDRIES									1,761				$ 1,761
Stock-based compensation expense									416				416
Net loss										(18,183)			(18,183)
Balance at Dec. 31, 2015									9,301	(79,731)			(70,430)
Balance (in shares) at Dec. 31, 2015						3,015,281
Increase (Decrease) in Stockholders' Equity
Conversion of redeemable convertible preferred stock to common stock									64,642				64,642
Conversion of redeemable convertible preferred stock to common stock (in shares)						2,486,199
Conversion of convertible promissory notes									8,634				8,634
Conversion of convertible promissory notes (in shares)						1,361,009
Reclassification of redeemable convertible preferred stock warrant liability to additional paid in capital									65				65
Issuance of common stock				$ 1			$ 33,863	$ 4,650			$ 33,864	$ 4,650
Stock issued during period (in shares)				5,000,000	625,000
Issuance of common stock upon exercise of stock options									48				$ 48
Issuance of common stock upon exercise of stock options (in shares)						10,639							10,639
Compensation expense related to vesting of common stock issued to GLOBAL FOUNDRIES									965				$ 965
Stock-based compensation expense									1,141				1,141
Net loss										(16,708)			(16,708)
Balance at Dec. 31, 2016						$ 1			$ 123,309	$ (96,439)			$ 26,871
Balance (in shares) at Dec. 31, 2016						12,498,128