Stockholders' Equity and Redeemable Convertible Preferred Stock (Tables)

9 Months Ended

Sep. 30, 2017

Stockholders' Equity Note [Abstract]

Schedule of designated separate series of capital stock

The Company had designated separate series of its capital stock as of September 30, 2017 and December 31, 2016 as summarized below:

	Number of Shares Issued
	and Outstanding as of
	September 30, 2017		December 31, 2016		Par Value		Conversion Ratio
Series "A"		—		—	$	0.0001	N/A
Series "C"		—		—		0.0001	0.05:1
Series “D"		4,725		4,725		0.0001	0.53:1
Series “D-1"		834		834		0.0001	0.53:1
Series “F-1"		—		—		0.0001	0.05:1
Series “H"		—		—		0.0001	0.53:1
Series “I”		—		—		0.0001	1.05:1
Series “J”		—		—		0.0001	0.05:1
Series “K”		—		—		0.0001	263.16:1

Schedule of warrant activity

A summary of warrant activity for the nine months ended September 30, 2017 is presented below:

	Warrants			Weighted Average Exercise Price		Total Intrinsic Value		Weighted Average Remaining Contractual Life (in years)
Outstanding as of December 31, 2016		1,250,311		$	9.21	$	—		3.91
Expired		(557	)
Outstanding as of September 30, 2017		1,249,754		$	8.98				3.17
Exercisable as of September 30, 2017		1,249,754		$	8.98	$	—		3.17

Schedule of fair value of options granted

A summary of option activity under the Company’s employee stock option plan for the nine months ended September 30, 2017 is presented below:

	Number of Shares			Weighted Average Exercise Price		Total Intrinsic Value		Weighted Average Remaining Contractual Life (in years)
Outstanding as of December 31, 2016		310,091		$	82.25	$	—		4.1
Employee options granted		15,788			1.02		7,420		4.7
Employee options expired		(176	)		—		—		—
Outstanding as of September 30, 2017		325,703		$	78.24	$	7,697		3.5
Options vested and expected to vest		325,703		$	78.24	$	7,697		3.5
Options vested and exercisable		317,811		$	80.15	$	3,987		3.4

A summary of option activity under the Company’s non-employee stock option plan for the nine months ended September 30, 2017 is presented below:

	Number of Shares		Weighted Average Exercise Price		Total Intrinsic Value		Weighted Average Remaining Contractual Life (in years)
Outstanding as of December 31, 2016		2,893	$	98.07	$	—		4.4
Non-employee options granted		—		—		—		—
Outstanding as of September 30, 2017		2,893	$	98.07	$	—		3.7
Options vested and expected to vest		2,893	$	98.07	$	—		3.7
Options vested and exercisable		2,893	$	98.07	$	—		3.7

Schedule of option activity

Stock-based compensation for the three and nine months ended September 30, 2017 and 2016 was comprised of the following ($ in thousands):

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2017		2016		2017		2016
Employee stock option awards	$	2	$	5	$	13		26
Non-employee restricted stock awards		—		—		—		255
Employee restricted stock units		—		49		—		72
Total compensation expense	$	2	$	54	$	13	$	353