Equity (Tables)

6 Months Ended

Jun. 30, 2016

Stockholders' Equity [Abstract]

Key assumptions for fair value calculation, stock options

The fair value calculations are based on the following assumptions:

	Six Months Ended June 30, 2016	Six Months Ended June 30, 2015
Risk free interest rate	0.04% - 3.19%	0.04% - 3.73%
Expected life (years)	2.82 - 7.00	3.26 - 6.88
Expected volatility	112.75% - 198.90%	93.63% - 198.38%
Expected dividends	None	None

Allocation of stock-based compensation expense related to stock option grants

The following table summarizes the allocation of stock-based compensation expense related to stock option grants for the three and six months ended June 30:

	Three Months Ended June 30,		Six Months Ended June 30,
	2016	2015	2016	2015
Research and development	$ 15	$ 47	$ 34	$ 113
Sales and marketing	$ 2	$ 34	$ 15	$ 86
General and administrative	$ 19	$ 65	$ 43	$ 145
Director options	$ 6	$ 12	$ 14	$ 27
Total stock-based compensation expense	$ 42	$ 158	$ 106	$ 371

Summary of option activity

A summary of option activity under the Company's plans for the six months ended June 30, 2016 and 2015 is as follows:

Options	2016				2015
	Shares	Weighted Average Exercise Price Per Share	Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value	Shares	Weighted Average Exercise Price Per Share	Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding at January 1,	82	$ 45.35		$ -	57	$ 56.13		$ -
Granted	-	$ -		$ -	29	$ 28.13		$ -
Exercised	-	$ -		$ -	-	$ -		$ -
Forfeited or expired	(8)	$ 42.16		$ -	(1)	$ 37.50		$ -
Outstanding at June 30	74	$ 45.71	3.65	$ -	85	$ 46.75	4.59	$ -
Vested and expected to vest at June 30	72	$ 46.22	3.10	$ -	83	$ 37.50	3.24	$ -
Exercisable at June 30	58	$ 51.10	3.10	$ -	52	$ 56.00	3.56	$ -

Summary of the significant ranges of outstanding and exercisable options

The following table summarizes significant ranges of outstanding and exercisable options as of June 30, 2016:

Range of Exercise Prices	Options Outstanding			Options Exercisable
	Number Outstanding	Weighted Average Remaining Contractual Term (in years)	Weighted Average Exercise Price	Number Outstanding	Weighted Average Exercise Price
$25.00 - $625.00	74	3.65	$ 45.71	58	$ 51.10

Summary of the status of the Company's non-vested shares

A summary of the status of the Company's non-vested shares as of June 30, 2016 is as follows:

Non-vested Shares	Shares	Weighted Average Grant-Date Fair Value
Non-vested at January 1, 2016	25	$28.61
Forfeited	(3)	$28.80
Vested	(6)	$46.22
Non-vested at June 30, 2016	16	$26.42

Information with respect to dividends issued on the Company's preferred stock

The following table summarizes the change in conversion price, the number of shares outstanding as of the conversion date and the number of Common Stock issued upon conversion of the Preferred Stock.

Class of Preferred Stock	Old Conversion Price	Adjusted Conversion Price	Shares Outstanding at Conversion Date	Common shares issued upon conversion
Series A-1	$ 175.00	$ 19.44	976	50
Series B	$ 54.13	$ 12.96	14,042	1,083
Series C	$ 28.13	$ 9.71	5,702	587
Series D-1	$ 28.13	$ 7.24	8,386	1,159
Series D-2	$ 62.50	$ 8.58	6,625	773
Total			35,731	3,652

Summary of the warrants issued

Information with respect to in-kind dividends issued on the Company's Preferred stock for the three and six-month periods ended June 30, 2016 and June 30, 2015 is as follows:

	Dividends				Beneficial Conversion Feature Related to dividends
	Three Months Ended June 30,		Six Months Ended June 30,		Three Months Ended June 30,		Six Months Ended June 30,
	2016	2015	2016	2015	2016	2015	2016	2015
Series A-1	$ 10	$ 17	$ 29	$ 35	$ -	$ -	$ 3	$ -
Series B	182	313	519	615	-	-	73	-
Series C	74	127	211	250	-	-	39	13
Series D-1	108	179	309	324	-	-	78	16
Series D-2	85	149	245	292	-	-	52	-
Total	$ 459	$ 785	$ 1,313	$ 1,516	$ -	$ -	$ 245	$ 29

Status of the warrants outstanding

A summary of the warrant activity for the six months ended June 30 is as follows:

	June 30, 2016		June 30, 2015
	Shares	Weighted Average Exercise Price Per Share	Shares	Weighted Average Exercise Price Per Share
Outstanding at beginning of period	205	$ 35.51	171	$ 36.13
Issued	1,551	$ 2.18	22	$ 28.13
Expired	-	$ -	(13)	$ 62.50
Outstanding at end of period	1,756	$ 5.27	180	$ 34.63
Exercisable at end of period	1,756	$ 5.27	180	$ 34.63

Information with respect to the classes of Preferred Stock

A summary of the status of the warrants outstanding and exercisable as of June 30, 2016 is as follows:

Number of Warrants	Weighted Average Remaining Life	Weighted Average Exercise Price per share
14	0.01	$0.30
105	0.03	$2.06
32	0.01	$0.51
54	0.06	$0.48
1,551	4.38	$1.92
1,756	4.48	$1.85