Net (Loss) Income Per Share (Tables)

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net (Loss) Income Per Share

The following tables set forth the computation of the Company’s basic and diluted net (loss) income per share (in thousands, except shares and per share data):

	Year Ended December 31,
	2016			2015			2014
Numerator:
Net (loss) income attributable to CareDx, Inc. used    to compute basic net loss per share	$	(39,469	)	$	(13,707	)	$	781
Add: interest expense related to subordinated    convertible note		—			—			364
Less: gain on change in fair value of derivative    related to subordinated convertible note		—			—			(118	)
Less: gain on extinguishment of derivative related    to subordinated convertible note		—			—			(120	)
Net (loss) income attributable to CareDx, Inc. used    to compute diluted net loss per share	$	(39,469	)	$	(13,707	)	$	907
Denominator:
Weighted-average shares used to compute basic    net (loss) income per share attributable to    CareDx, Inc.		16,496,911			11,860,885			5,815,928
Effect of potentially dilutive securities:
Convertible preferred stock		—			—			—
Convertible preferred stock		—			—			2,972,051
Subordinated convertible note		—			—			134,341
Employee stock options		—			—			360,681
Weighted-average shares used to compute diluted    net (loss) income per share attributable to    CareDx, Inc.		16,496,911			11,860,885			9,283,001
Net (loss) income per share attributable to    CareDx, Inc.:
Basic	$	(2.39	)	$	(1.16	)	$	0.13
Diluted	$	(2.39	)	$	(1.16	)	$	0.10

Potentially Dilutive Securities Excluded from Diluted Net (Loss) Income Per Share

The following potentially dilutive securities have been excluded from diluted net (loss) income per share, because their effect would be antidilutive:

	Year Ended December 31,
	2016		2015		2014
Shares of common stock subject to outstanding    options		1,757,309		1,577,317		539,645
Shares of common stock subject to outstanding    common stock warrants		3,259,926		301,069		213,677
Restricted stock units		306,245		106,200		—
Total common stock equivalents		5,323,480		1,984,586		753,322