Stockholders' Equity and Redeemable Convertible Preferred Stock (Tables)

12 Months Ended

Dec. 31, 2015

Stockholders Equity Tables

Preferred Stock

The Company had designated separate series of its capital stock as of December 31, 2015 and December 31, 2014 as summarized below:

	Number of Shares Issued
	and Outstanding as of December 31,
	2015		2014		Par Value		Conversion Ratio
Series "A"		-		-	$	0.0001	N/A
Series "C"		-		1		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"		381,967		439,043		0.0001	0.53:1
Series “I”		-		35,541		0.0001	1.05:1
Series “J”		-		-		0.0001	0.05:1
Series “K”		1,240		-		0.0001	263.16:1

Summary of warrant activity

A summary of warrant activity for year ended December 31, 2015 is presented below:

	Warrants			Weighted Average Exercise Price		Total Intrinsic Value		Weighted Average Remaining Contractual Life  (in years)
Outstanding as of January 1, 2015		40,452		$	260.34	$	-		4.03
Issued		2,264,986			4.87		-		2.82
Expired		(550	)		5,700.00
Outstanding as of December 31, 2015		2,304,888		$	32.94	$	-		2.83
Exercisable as of December 31, 2015		2,304,888		$	32.94	$	-		2.83

Fair value of stock-based compensation

The fair value of options granted in 2015 and 2014 was estimated using the following assumptions:

	For the Years Ended December 31,
	2015	2014
Exercise price	$4.18 - $32.87	$25.46 - $110.77
Expected stock price volatility	117.2% - 130.4%	77.7% - 90.6%
Risk-free rate of interest	0.74% - 1.08%	0.76% - 1.80%
Term (years)	1.9 - 3.0	2.5 - 5.5

Summary of option activity

A summary of option activity under the Company’s employee stock option plan for year ended December 31, 2015 is presented below:

	Number of Shares			Weighted Average Exercise Price		Total Intrinsic Value		Weighted Average Remaining Contractual Life (in years)
Outstanding as of January 1, 2015		275,970		$	94.37	$	-		6.0
Employee options granted		23,682			9.53		-		4.4
Employee options forfeited		(13,157	)		54.34		-		-
Employee options expired		(8	)		4,332.00		-		-
Outstanding as of December 31, 2015		286,487		$	89.07	$	-		5.0
Options vested and expected to vest		286,487		$	89.07	$	-		5.0
Options vested and exercisable		284,514		$	89.66	$	-		5.0

A summary of options that the Company granted to non-employees for the year ended December 31, 2015 is presented below:

	Number of Shares		Weighted Average Exercise Price		Total Intrinsic Value		Weighted Average Remaining Contractual Life (in years)
Outstanding as of January 1, 2015		2,893	$	98.07	$	-		6.4
Non-employee options granted		-		-		-		-
Outstanding as of December 31, 2015		2,893	$	98.07	$	-		5.4
Options vested and expected to vest		2,893	$	98.07	$	-		5.4
Options vested and exercisable		2,893	$	98.07	$	-		5.4

Summary of the restricted stock award activity

A summary of the restricted stock award activity for the year ended December 31, 2015 is as follows:

	Number of Units			Weighted Average Grant Day Fair Value
Nonvested at January 1, 2015		394		$	49.97
Granted		6,732			8.49
Vested		(7,126	)		5.30
Nonvested at December 31, 2015		-		$	-

Stock-based compensation expense

Stock-based compensation expense for the year ended December 31, 2015 and 2014 was comprised of the following ($ in thousands):

	For the Years Ended December 31,
	2015		2014
Employee restricted stock awards	$	132	$	49
Employee stock option awards		155		12,403
Non-employee restricted stock awards		84		176
Non-employee option awards		-		48
Total compensation expense	$	371	$	12,676