Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Computation of basic and diluted net loss per share for continuing and discontinued operations

The following table presents the computation of basic and diluted net loss per share for continuing and discontinued operations (in thousands, except per share amounts):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Numerator:
Loss from continuing operations	$	(9,313	)	$	(3,076	)	$	(18,231	)	$	(11,129	)
Loss from discontinued operations		(42	)		(61	)		(116	)		(220	)
Net loss	$	(9,355	)	$	(3,137	)	$	(18,347	)	$	(11,349	)
Denominator:
Weighted average common shares outstanding		42,497			13,954			32,658			11,400
Weighted average unvested common shares subject    to repurchase		—			(16	)		—			(51	)
Weighted average common shares outstanding—basic and diluted		42,497			13,938			32,658			11,349
Net loss per share, basic and diluted:
Continuing operations	$	(0.22	)	$	(0.22	)	$	(0.56	)	$	(0.98	)
Discontinued operations	$	(0.00	)	$	(0.01	)	$	(0.00	)	$	(0.02	)
Net loss per share, basic and diluted	$	(0.22	)	$	(0.23	)	$	(0.56	)	$	(1.00	)

Weighted-average anti-dilutive securities not included in diluted net loss per share

The anti-dilutive securities not included in diluted net loss per share were as follows calculated on a weighted average basis (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Options to purchase common stock		325		2,948		367		1,861
Unvested restricted share awards		—		16		—		51
Series A Convertible Preferred Stock		2,022		4,848		2,181		4,135
Convertible Notes		922		—		703		—
Warrants to purchase common stock		1,075		—		1,956		1,013
Total		4,344		7,812		5,207		7,060