Equity (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands																		2 Months Ended	6 Months Ended	12 Months Ended
		Jul. 03, 2018	Jul. 02, 2018	Jun. 28, 2018	Apr. 02, 2018	Mar. 28, 2018	Mar. 02, 2018	Feb. 26, 2018	Feb. 21, 2018	Feb. 21, 2018	Feb. 07, 2018	Jan. 08, 2018	Dec. 02, 2017	Mar. 14, 2017	Mar. 08, 2017	Jul. 07, 2016	Mar. 28, 2011	Feb. 28, 2018	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Oct. 24, 2018	Jun. 29, 2018	Mar. 31, 2018	Nov. 28, 2017	Sep. 28, 2016	May 24, 2016	Sep. 09, 2015	Dec. 16, 2013
Common stock, par value																				$ 0.0001	$ 0.0001
Common stock, shares issued																				38,408,953	1,483,556
Common stock, shares outstanding																				38,408,953	1,483,556
Number of warrants to purchase common stock																				40,746,189
Conversion stock shares converted																				4,641,185
Warrant exercise price																				$ 1.25
Shares issued during the period new issue value																				$ 15,827
Fair value of embedded derivative													$ 66
Common stock shares authorized																				150,000,000	150,000,000
Accretion of the redeemable preferred shares																				$ (438)
Aggregate intrinsic value of the total exercisable warrants and options																				$ 1
Outstanding pre-funded warrants are exercisable into shares of common stock																				1,601,666
Capital stock shares authorized																				155,000,000
Capital stock par value																				$ 0.0001
Weighted average of the remaining contractual life																				7 years 6 months 25 days
Weighted average exercise price																					$ 24.85
Umbrella Plan [Member]
Stock option plan expiration date																	Mar. 27, 2021
Number of common stock awards reserve for future issuance																	572			310
Employee and Non-employee Stock Options [Member]
Weighted average of the remaining contractual life																				6 months 18 days
Unvested stock-based compensation																				$ 38
Chief Executive Officer [Member]
Stock option granted																				0	118
Exercise price range lower limit																				$ 24.85	$ 24.85
Exercise price range upper limit																				$ 34.65	$ 34.65
Stock option vesting period																				3 years	3 years
Fair value of stock option																				$ 3	$ 3
Chief Executive Officer [Member] | 2013 Plan [Member]
Number of common stock awards reserve for future issuance																				8,910,610									572
Stock option vested number of grant, shares																				8,919,737		8,900,000				7,200	11,428	537
Employees and Directors [Member]
Stock option granted																				0	118
Exercise price range lower limit																				$ 24.85	$ 24.85
Exercise price range upper limit																				$ 34.65	$ 34.65
Stock option vesting period																				3 years	3 years
Fair value of stock option																				$ 3	$ 3
Series D Purchase Agreement [Member]
Convertible preferred stock conversion price per share							$ 3.00
Sale of stock stated value per share, description									Qualified Offering on a $1.00 per stated value for $1.00 new subscription amount basis (subject to the beneficial ownership limitation set forth in the certificate of designation for the Series C Preferred Stock).
Sale of stock, offering percentage									15.00%											15.00%
Series D Purchase Agreement [Member] | Series D Investor [Member]
Gross proceeds from offering, cost					$ 300
SPA Amendment [Member]
Shares issued during the period new issue value										$ 3,200
Fair value of embedded derivative									$ 620	620
Amount of redeemable preferred stock										$ 2,580
Waiver Agreement [Member] | Series D Investor [Member]
Gross proceeds from offering, cost								$ 7,000
Sale of stock, offering percentage								15.00%
Offering description								(i) the Series D Exchange Right would not be applicable to an offering of up to $7,000,000 which occurred no later than March 9, 2018, (ii) the Company shall reduce the conversion price of the Series D Preferred Stock to the public offering price of our common stock in such offering, and (iii) instead of using 15% of the proceeds from such offering to redeem shares of Series C Preferred Stock held by the Series D Investor, the Company shall use 15% of the proceeds from such offering to redeem a portion of the outstanding shares of Series D Preferred Stock held by the Series D Investor at a per share purchase price equal to the stated value of the Series D Preferred Stock.
Letter Agreement [Member]
Accretion of the redeemable preferred shares																			$ 438
Letter Agreement [Member] | Series D Investor [Member]
Sale of stock stated value per share, description				Qualified Offering on a $1.00 per stated value for $1.00 new subscription amount basis, all outstanding shares of Series C Preferred Stock held by the Series D Investor will be redeemed at a per share purchase price equal to the stated value of the Series C Preferred Stock
Series A Warrants [Member]
Number of warrants to purchase common stock																		1,545
Common Stock [Member]
Shares issued during the period new issue							1,000,000													35,588,810
Gross proceeds from offering, cost							$ 3,000
Shares issued during the period new issue value																				$ 4
Stock issued price per shares																								$ 3.00
Accretion of the redeemable preferred shares
Number of redeemable preferred stock
Underwriter Warrants [Member]
Number of warrants to purchase common stock							60,000
Warrant exercise price							$ 3.75
Offering description							The Company issued to the underwriter warrants to purchase up to 60,000 shares of common stock, or 6% of the number of shares of common stock sold in the offering (the March Underwriter Warrants). The March Underwriter Warrants are exercisable at any time and from time to time, in whole or in part, following the date of issuance and ending February 27, 2023, at a price per share equal to $3.75 (125% of the offering price to the public per share).
Percentage for shares of common stock sold					6.00%		6.00%
Percentage for gross proceeds of offering					125.00%		125.00%
Series D Warrants [Member]
Common units, per share																				$ 0.30
Pre-funded units, per share																				$ 0.30
Warrant [Member]
Shares issued during the period new issue																				20,880,250
Shares issued during the period new issue value																				$ 208,803
Exercise of pre-funded warrants																				20,880,250
Preferred Stock Blank Check [Member]
Preferred stock shares authorized																				5,000,000
Maximum [Member] | Underwriter Warrants [Member]
Number of warrants to purchase common stock					171,429
Stock issued price per shares					$ 2.1875
March 2017 Offering [Member]
Gross proceeds from offering, cost														$ 6,800
Gross proceeds from offering, cost percentage														8.00%
July 2016 Offering [Member]
Number of exercised options to purchase shares																		13,508
Public Offering [Member]
Shares issued during the period new issue					2,857,143
Gross proceeds from offering, cost					$ 5,000
Stock issued price per shares					$ 1.75
Qualified Offering [Member] | Series D Investor [Member]
Due from affiliates				$ 3,000
July 2018 Offering [Member]
Gross proceeds from offering, cost		$ 9,800
July 2018 Offering [Member] | Letter Agreement [Member]
Amount utilized for redemption of outstanding shares		$ 2,264,269
July 2018 Offering [Member] | Underwriting Agreement [Member]
Common stock, par value																							$ 0.0001
Number of warrants to purchase common stock																							4,999,999
Warrant exercise price																							$ 0.29
Common units, shares																							10,851,417
Pre-funded units, shares																							22,481,916
Common units, per share																							$ 0.30
Pre-funded units, per share																							0.29
Underwriting discount and commission price per shares																							$ 0.0203
July 2018 Offering [Member] | Common Stock [Member] | Underwriting Agreement [Member]
Number of warrants to purchase common stock																							4,999,999
July 2018 Offering [Member] | Underwriter Warrants [Member]
Stock issued price per shares		$ 0.375
Percentage for shares of common stock sold		6.00%
Percentage for gross proceeds of offering		125.00%
July 2018 Offering [Member] | Series D Warrants [Member] | Underwriting Agreement [Member]
Number of warrants to purchase common stock																							4,999,999
Underwriting discount and commission price per shares																							$ 0.0007
July 2018 Offering [Member] | Maximum [Member] | Underwriter Warrants [Member]
Number of warrants to purchase common stock		2,000,000
July 2018 Offering [Member] | Maximum [Member] | Series D Warrants [Member] | Underwriting Agreement [Member]
Common stock, par value																							$ 0.01
Number of warrants to purchase common stock																							4,999,999
Common stock shares authorized																							4,999,999
Secretary of State of Delaware a Certificate of Amendment [Member]
Reverse stock split											one-for-thirty-five reverse stock split.
Common stock, par value											$ 0.0001
Common stock, shares issued											51,900,000
Common stock, shares outstanding											1,500,000
Series B Convertible Preferred Stock [Member]
Preferred stock, shares outstanding																				17,303
Convertible preferred stock shares issued upon conversion																				3,330,828	284,446
Shares issued during the period new issue																				442,424
Convertible preferred stock conversion price per share																				$ 0.30
Number of exercised options to purchase shares																		13,508
Proceeds from placement agent																		$ 557,205
Accretion of the redeemable preferred shares
Number of redeemable preferred stock
Series B Convertible Preferred Stock [Member] | Maximum [Member]
Convertible stock price, percentage																					10.00%
Series B Convertible Preferred Stock [Member] | July 2016 Offering [Member]
Preferred stock, shares outstanding															311,521
Shares issued during the period new issue															258,952
Convertible preferred stock conversion price per share														$ 56.00		$ 288.75				$ 0.30
Number of common stock shares sold																442,424
Number of warrants to purchase common stock																50,620
Share price																$ 33.00
Conversion stock shares converted														0.589		0.114				110
Percentage of cumulative dividend rate																				15.00%
Gross proceeds from offering, cost																$ 14,600					$ 8,000
Warrant exercise term																					5 years
Warrant exercise price																					$ 175.00
Option issued to purchase of shares percentage																3.50%
Option issued exercise price percentage																125.00%
Series B Convertible Preferred Stock [Member] | March 2017 Offering [Member]
Convertible preferred stock conversion price per share														$ 56.00
Series B Convertible Preferred Stock [Member] | Private Placements [Member]
Convertible preferred stock shares issued upon conversion													1,306,536												180,992
Convertible preferred stock conversion price per share													$ 7.00
Series C Convertible Preferred Stock [Member]
Preferred stock, shares outstanding																				61,423
Convertible preferred stock shares issued upon conversion																				1,310,357
Shares issued during the period new issue																				1,069,822
Convertible preferred stock conversion price per share																				$ 0.30
Accretion of the redeemable preferred shares
Number of redeemable preferred stock
Series C Convertible Preferred Stock [Member] | March 2017 Offering [Member]
Convertible preferred stock shares issued upon conversion																				1,310,357
Number of common stock shares sold														1,069,822
Share price																				$ 0.30
Conversion stock shares converted														0.114
Warrant exercise price														$ 6.40
Series D Convertible Preferred Stock [Member]
Preferred stock, shares outstanding
Convertible preferred stock shares issued upon conversion
Shares issued during the period new issue
Series D Convertible Preferred Stock [Member] | Redemption Obligation [Member]
Gross proceeds from offering, cost percentage													12.50%
Shares issued during the period new issue value													$ 1,000
Series D Convertible Preferred Stock [Member] | Redemption Obligation [Member] | Maximum [Member]
Shares issued during the period new issue value													$ 1,500
Series D Convertible Preferred Stock [Member] | Private Placements [Member]
Shares issued during the period new issue													750
Convertible preferred stock conversion price per share													$ 7.00
Conversion stock shares converted													142.86							42,677
Proceeds from sale of stock													$ 750
Shares issued during the period new issue value													$ 1
Common shares outstanding percentage													20.00%							19.99%
Sale of stock stated value per share, description																				In addition, the SPA contains a "most favored nation" provision, which provides that, until the Company consummates a "Qualified Offering", in the event the Company undertakes, or enter into any agreement to undertake, the issuance and sale of common stock and/or common stock equivalents to third party investors for cash (a "Subsequent Financing"), the Series D Investor may elect, in its sole discretion, to exchange all or some of the Series D Preferred Stock then held by such investor for any securities or units issued in such Subsequent Financing on a $1.00 per stated value for $1.00 new subscription amount basis (the "MFN Adjustment").
Series D Convertible Preferred Stock [Member] | Private Placements [Member] | Investor [Member]
Shares issued during the period new issue value													$ 1
Sale of stock stated value per share, description													The Series D Investor also had the option to exchange their Series D Preferred Stock into the securities issued in a Qualified Offering upon consummation of a Qualified Offering on a $1.00 per stated value for $1.00 new subscription amount basis.
Series B Warrants [Member]
Number of warrants to purchase common stock																				122,269
Warrant exercise price																				$ 70.00
Series B Warrants [Member] | March 2017 Offering [Member]
Number of warrants to purchase common stock														122,269
Warrant exercise price														$ 70.00
Series C Warrants [Member] | March 2017 Offering [Member]
Number of warrants to purchase common stock														122,269
Gross proceeds from offering, cost percentage														3.00%
Redeemable Preferred Shares [Member]
Fair value of embedded derivative													$ 934
Series D Convertible Preferred Stock [Member]
Convertible preferred stock shares issued upon conversion																					206,105
Shares issued during the period new issue												8,295									8,295
Series B Convertible Preferred Stock [Member]
Percentage of cumulative dividend rate																				15.00%
Fair value of embedded derivative																					$ 0
Series B Convertible Preferred Stock [Member] | Redemption Obligation [Member] | Maximum [Member]
Number of preferred shares converted into common stock												$ 0									$ 274
Series B Convertible Preferred Stock [Member] | Qualified Offering [Member]
Sale of stock stated value per share, description			Series B Convertible Preferred Stock into securities issued in a Qualified Offering on a $1.00 per stated value for $1.00 new subscription amount basis upon a Qualified Offering.
Series B Preferred Stock [Member]
Preferred stock, shares outstanding																				17,303			17,303
Convertible preferred stock shares issued upon conversion																		111,443					2,759,829
Convertible preferred stock conversion price per share																							$ 0.30
Conversion stock shares converted	[1]																			3,330,828
Series B Preferred Stock [Member] | March 2018 Offering [Member]
Preferred stock, shares outstanding							17,303
Convertible preferred stock shares issued upon conversion							190,333
Convertible preferred stock conversion price per share							$ 3.00
Series B Preferred Stock [Member] | April 2018 Offering [Member]
Preferred stock, shares outstanding						17,303
Convertible preferred stock shares issued upon conversion						237,916
Convertible preferred stock conversion price per share						$ 1.75
Series D Preferred Stock [Member]
Preferred stock, shares outstanding					300
Convertible preferred stock shares issued upon conversion					71,429
Convertible preferred stock conversion price per share					$ 1.75
Preferred stock description					The fair value increased substantially, i.e by more than 10%, the change in terms was accounted for as an extinguishment.		The fair value increased substantially, i.e by more than 10%, the change in terms was accounted for as an extinguishment.
Changes in carrying amount					$ 32		$ 49
Accretion of the redeemable preferred shares
Number of redeemable preferred stock																				750
Series D Preferred Stock [Member] | SPA Amendment and Waiver Agreement [Member]
Convertible preferred stock conversion price per share					$ 3.00		$ 7.00
Offering description							15% of the gross proceeds from the offering
Payments to acquire shares							$ 450
Number of shares purchased							450
Series D Preferred Stock [Member] | March 2018 Offering [Member]
Preferred stock, shares outstanding							750
Convertible preferred stock shares issued upon conversion							142,857
Convertible preferred stock conversion price per share							$ 3.00
Series D Preferred Stock [Member] | July 2018 Offering [Member]
Number of redeemable preferred stock		300
Series C Preferred Stock [Member]
Preferred stock, shares outstanding																				61,423			378,840
Convertible preferred stock shares issued upon conversion																							6,696,448
Convertible preferred stock conversion price per share																							$ 0.30
Conversion stock shares converted																				1,310,357
Series C Preferred Stock [Member] | Series D Purchase Agreement [Member] | Series D Investor [Member]
Conversion stock shares converted					46,875
Series C Preferred Stock [Member] | Second Waiver Agreement [Member] | Series D Investor [Member] | Planned April 2018 Offering [Member]
Gross proceeds from offering, cost						$ 5,000
Offering description						(i) the Series D Exchange Right would not be applicable to a subsequent financing consisting solely of shares of common stock, which shall be publicly registered on Form S-3 for gross proceeds to us of up to $5,000,000, to be consummated by not later than April 3, 2018 (the Planned April 2018 Offering), (ii) the Company's obligation to use 15% of the proceeds from any subsequent offering of our securities that is not a Qualified Offering to redeem the outstanding shares of the Series C Preferred Stock held by the Series D Investor would not be applicable to the Planned April 2018 Offering, (iii) the Company shall reduce the conversion price of the Series D Preferred Stock to the public offering price of our common stock sold in the Planned April 2018 Offering, and (iv) the Company shall use $300,000 of the proceeds from the Planned April 2018 Offering to redeem outstanding shares of Series C Preferred Stock held by the Series D Investor at a per share purchase price equal to the stated value of the Series C Preferred Stock.
Amount utilized for redemption of outstanding shares						$ 300
Series C Preferred Stock [Member] | March 2018 Offering [Member]
Preferred stock, shares outstanding							741,651
Convertible preferred stock shares issued upon conversion							1,497,427
Convertible preferred stock conversion price per share							$ 3.00
Series C Preferred Stock [Member] | April 2018 Offering [Member]
Preferred stock, shares outstanding						451,695
Convertible preferred stock shares issued upon conversion						688,297
Convertible preferred stock conversion price per share						$ 1.75
Series C Preferred Stock [Member] | July 2018 Offering [Member]
Number of redeemable preferred stock		306,917
Restricted Stock [Member] | Employees and Directors [Member]
Stock option granted																				0	84
Stock option vesting period																				3 years	3 years
Fair value of stock option																				$ 3	$ 3
Restricted Stock [Member] | Chief Executive Officer [Member]
Stock option granted																				0	84
Stock option vesting period																				3 years	3 years
Fair value of stock option																				$ 3	$ 3

[1] Including the shares of common stock the holders of Series B Convertible Preferred Stock are entitled to receive as cumulative dividends at the rate per share of 15% per annum of the stated value for five years, payable in cash or common stock, at the Company's discretion, but excluding effect of future conversion price adjustment, if any.