Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2015

Accounting Policies [Abstract]

Schedule of assumptions used for common stock warrants liability issued

Date of issuance	Exercise Price		Closing Market Price		Risk-free Rate			Market Price Volatility			Remaining Term (years)		Expected dividend yield			Probability of change in control
February 26, 2015	$	0.50	$	0.45		1.62	%		102.5	%		5.50		0.0	%		15.0	%
March 17-31, 2015		variable	$	0.45		0.03	%		190.0	%		0.21		0.0	%		NA

Schedule of assumptions used for common stock warrants liability outstanding

The following table reflects assumptions for common stock warrants liability outstanding as of September 30, 2015:

Date of issuance	Exercise Price		Closing Market Price		Risk-free Rate			Market Price Volatility			Remaining Term (years)		Expected dividend yield			Probability of change in control
June 3, 2013	$	11.20	$	1.18		0.78	%		130.0	%		2.68		0.0	%		15.0	%
November 15, 2013	$	68.20	$	1.18		1.03	%		130.0	%		3.63		0.0	%		15.0	%
July 9, 2014	$	63.80	$	1.18		1.15	%		120.0	%		4.28		0.0	%		15.0	%
November 18, 2014	$	16.20	$	1.18		1.56	%		107.0	%		6.14		0.0	%		NA
February 26, 2015	$	1.24	$	1.18		1.35	%		113.7	%		4.90		0.0	%		15.0	%
March 17-31, 2015		variable	$	1.18		0.14	%		138.4	%		0.6		0.0	%		NA

Schedule of summary of changes to warrant valuations

	2013 & 2014 Issuances			2015 Issuances			Total
Warrants outstanding at December 31, 2014		406,736			-			406,736
Issuances		-			4,174,681			4,174,681
Anti-dilution adjustments		256,452			-			256,452
Exchanged for common stock		-			(1,147,805	)		(1,147,805	)
Exercised/extinguished		(17,298	)		(2,789,709	)		(2,807,007	)
Warrants outstanding at September 30, 2015		645,890			237,167			883,057

	2013 & 2014 Issuances			2015 Issuances			Total
Value of warrants at December 31, 2014	$	2,491		$	-		$	2,491
Value of warrants issued		-			12,246			12,246
Adjustment for warrants exercised/extinguished		(3	)		(7,259	)		(7,262	)
Changes in fair value, net		(2,153	)		(4,771	)		(6,924	)
Value of warrants at September 30, 2015	$	335		$	216		$	551

Schedule of fair value of assets and liabilities measured on recurring basis

Balance at September 30, 2015 (in thousands)	Total		Quoted Prices in Active Markets for Identical Items (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Common stock warrant liability	$	551	$	—	$	—	$	551

Schedule of reconciliation from the beginning to the ending balance of common stock warrant liability measured at fair value on a recurring basis using significant unobservable inputs

(in thousands)	Fair Value Measurements Using Significant Unobservable Inputs
Fair value of common stock warrant liability at December 31, 2014	$	2,491
Issuance of common stock warrants		12,246
Change in the fair value of common stock warrant liability, net		(6,924	)
Adjustment for warrants exercised/extinguished		(7,262	)
Fair value of common stock warrant liability at September 30, 2015	$	551