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Equity (Details Narrative) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
May 14, 2018 USD ($) Integer $ / shares shares | Jul. 08, 2016 USD ($) $ / shares | Aug. 31, 2018 shares | Jul. 31, 2018 shares | May 31, 2018 USD ($) shares | Jan. 31, 2017 USD ($) $ / shares shares | Jul. 31, 2016 USD ($) $ / shares shares | Mar. 31, 2018 USD ($) $ / shares shares | Dec. 31, 2018 USD ($) $ / shares shares | Dec. 31, 2017 USD ($) $ / shares shares | Sep. 07, 2018 $ / shares | Jun. 30, 2018 shares | Feb. 24, 2017 shares
Warrants to purchase of common stock shares | shares |  |  |  |  | 145,834 |  |  | 832,000 |  |  |  |  |
Warrants exercise price | $ / shares |  |  |  |  |  | $ 6.60 |  |  |  |  |  |  |
Gross proceeds of warrants |  |  |  |  | $ 300 |  |  |  | $ 7,577 | $ 679 |  |  |
Proceeds from public offering | $ 15,000 |  |  |  |  |  |  |  |  |  |  |  |
Stock issued price per shares | $ / shares |  | $ 10.56 |  |  |  |  |  |  |  |  |  |  |
Preferred stock stated value | $ / shares |  |  |  |  |  |  |  |  | $ 0.01 | $ 0.01 |  |  |
Common stock state value | $ / shares |  |  |  |  |  |  |  |  | 0.01 | $ 0.01 |  |  |
Conversion price per share | $ / shares | $ 1.45 |  |  |  |  |  |  |  |  |  | $ 0.48 |  |
Share price | $ / shares |  |  |  |  |  |  |  |  | $ 3.00 |  |  |  |
Proceeds from issuance of units | $ 15,000 |  |  |  |  |  |  |  | $ 6,749 |  |  |  |
Preferred stock issuance costs | 6,800 |  |  |  |  |  |  |  |  |  |  |  |
Allocated to preferred stock | $ 600 |  |  |  |  |  |  |  |  |  |  |  |
Warrants issuance cost |  |  |  |  |  | $ 100 |  |  |  |  |  |  |
Allocated to warrants |  |  |  |  |  | 800 |  |  |  |  |  |  |
Proceeds from warrant exercised |  |  |  |  |  |  |  |  | 1,652 |  |  |  |
Proceeds from issuance of common stock gross |  |  |  |  |  | 3,900 |  |  |  |  |  |  |
Proceeds from issuance of common stock net |  |  |  |  |  | 3,100 |  |  |  | $ 3,128 |  |  |
Stock issuance cost |  |  |  |  |  | $ 600 |  |  |  |  |  |  |
Warrants expire term |  |  |  |  |  | 5 years |  |  |  |  |  |  |
Common stock, issued | shares |  |  |  |  |  |  |  |  | 21,793,641 | 3,028,065 |  |  |
Preferred stock, issued | shares |  |  |  |  |  |  |  |  | 4,074 | 0 |  |  |
Fair value of excess carrying value per shares | $ / shares |  | $ 4.08 |  |  |  |  |  |  |  |  |  |  |
Fair value of excess carrying value |  | $ 2,500 |  |  |  |  |  |  |  |  |  |  |
Number of common stock received |  |  |  |  |  |  |  |  |  | $ 3,128 |  |  |
July 12, 2018 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares |  |  |  |  |  |  |  |  | $ 0.6543 |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercise price | $ / shares |  |  |  |  |  |  |  | $ 12 |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercise price | $ / shares |  |  |  |  |  |  |  | $ 2.125 |  |  |  |  |
Secondary Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds of warrants |  |  |  |  |  |  | $ 11,400 |  |  |  |  |  |
Class of unit description |  |  |  |  |  |  | Each Class A Unit consisted of 1/12th share of common stock and one warrant to purchase 1/12th share of common stock. Each Class B Unit consisted of one share of preferred stock convertible into 83 shares of common stock and warrants to purchase 83 shares of common stock. |  |  |  |  |  |
Secondary Offering [Member] | Underwriter [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase of common stock shares | shares |  |  |  |  |  |  |  |  |  |  |  |  | 30,000
Public Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued price per shares | $ / shares | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt conversion, description | (i) for the first 40 trading days following the closing of this offering, $1.4512 (the "Conversion Price"), (ii) after 40 trading days but prior to the 81st trading day, the lesser of (a) the Conversion Price and (b) 87.5% of the lowest volume weighted average price for our Common Stock as reported at the close of trading on the market reporting trade prices for the Common Stock during the five trading days prior to the 41st trading day, and (iii) after 80 trading days, the lesser of (a) the Conversion Price and (b) 87.5% of the lowest volume weighted average price for our Common Stock as reported at the close of trading on the market reporting trade prices for the Common Stock during the five trading days prior to the date of the notice of conversion. In the case of (ii)(b) and (iii)(b) above, the share price shall not be less than $0.48 (the "Floor Price"). |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares | $ 1.4512 |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument trading days | Integer | 40 |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument trading percentage | 87.50% |  |  |  |  |  |  |  |  |  |  |  |
Share price | $ / shares | $ 0.48 |  |  |  |  |  |  |  |  |  |  |  |
August 2018 Warrant Exercise [Member] | Secondary Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants converted into shares of common stock | shares |  |  | 242,063 |  |  |  |  |  |  |  |  |  |
July 2018 Warrant Exercise [Member] | Public Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants converted into shares of common stock | shares |  |  |  | 29,927 |  |  |  |  |  |  |  |  |
Warrant exercise | shares |  |  |  | 29,927 |  |  |  |  |  |  |  |  |
Convertible Preferred Stock and Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from public offering | $ 15,000 |  |  |  |  |  |  |  |  |  |  |  |
Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase of common stock shares | shares | 758 |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercise price | $ / shares | $ 1.60 |  |  |  |  |  |  |  |  |  |  |  |
Warrant term | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Common stock state value | $ / shares | $ 1,100 |  |  |  |  |  |  |  |  |  |  |  |
Share price | $ / shares |  |  |  |  |  |  |  |  | 0.01 |  |  |  |
Warrants issuance cost | $ 6,900 |  |  |  |  |  |  |  |  |  |  |  |
Allocated to warrants | 700 |  |  |  |  |  |  |  |  |  |  |  |
Warrants for derivative liability | $ 700 |  |  |  |  |  |  |  |  |  |  |  |
Warrants [Member] | Secondary Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase of common stock shares | shares |  |  |  |  |  | 333,750 | 1,054,167 |  |  |  |  |  |
Warrants exercise price | $ / shares |  |  |  |  |  |  | $ 12.00 |  |  |  |  |  |
Series E Common Stock Purchase Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant exercise | shares |  |  |  |  |  |  |  | 668,335 |  |  |  |  |
Warrants exercise price | $ / shares |  |  |  |  |  |  |  | $ 12.00 | 2.125 |  |  |  |
Gross proceeds of warrants |  |  |  |  |  |  |  | $ 1,400 |  |  |  |  |
Number of shares entitled for warrants | shares |  |  |  |  |  |  |  | 832,000 |  |  |  |  |
New Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercise price | $ / shares |  |  |  |  |  |  |  | $ 2.00 |  |  |  |  |
Percentage of warrant shares issued for new warrants |  |  |  |  |  |  |  | 100.00% |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued price per shares | $ / shares |  |  |  |  |  |  |  |  | $ 6.48 |  |  |  |
Stock issuance cost |  |  |  |  |  |  |  |  | $ 601 | 601 |  |  |
Number of common stock received |  |  |  |  |  |  |  |  |  | $ 8 |  |  |
Number of common stock exercise, shares | shares |  |  |  |  |  |  |  |  |  | 741,667 |  |  |
Common Stock [Member] | Secondary Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares of common stock sold | shares |  |  |  |  |  | 741,667 |  |  |  |  |  |  |
Common stock, issued | shares |  |  |  |  |  |  | 438,167 |  |  |  |  |  |
Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock shares conversion | shares |  |  |  |  |  |  |  |  | 616,000 |  |  |  |
Stock issuance cost |  |  |  |  |  |  |  |  | $ 668 | $ 668 |  |  |
Preferred stock, issued | shares |  |  |  |  |  |  |  |  | 7,392 |  |  |  |
Number of common stock received |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock exercise, shares | shares |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock [Member] | Secondary Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock shares conversion | shares |  |  |  |  |  |  | 616,000 |  |  |  |  |  |
Preferred stock, issued | shares |  |  |  |  |  |  | 7,392 |  |  |  |  |  |
Series B Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock shares conversion | shares |  |  |  |  | 4,072 |  |  |  |  |  |  | 4,072 |
Preferred stock stated value | $ / shares | $ 1,100 |  |  |  |  |  |  |  |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock shares conversion | shares | 11,369,900 |  |  |  | 3,086,570 |  |  |  |  |  |  | 3,086,570 |
Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock shares conversion | shares | 15,000 |  |  |  |  |  |  |  |  |  |  |  |
Class A Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to warrants |  |  |  |  |  |  |  |  | $ 2,400 |  |  |  |
Proceeds from issuance of common stock gross |  |  |  |  |  |  |  |  | 4,900 |  |  |  |
Proceeds from issuance of common stock net |  |  |  |  |  |  |  |  | 2,500 |  |  |  |
Stock issuance cost |  |  |  |  |  |  |  |  | 300 |  |  |  |
Class A Units [Member] | Secondary Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock shares conversion | shares |  |  |  |  |  |  | 83 |  |  |  |  |  |
Warrants to purchase of common stock shares | shares |  |  |  |  |  |  | 83 |  |  |  |  |  |
Stock issued price per shares | $ / shares |  |  |  |  |  |  | $ 1.00 |  |  |  |  |  |
Number of shares of common stock sold | shares |  |  |  |  |  |  | 5,258,000 |  |  |  |  |  |
Class A Units [Member] | Secondary Offering [Member] | Underwriter [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares of common stock sold | shares |  |  |  |  |  |  | 1,650,000 |  |  |  |  |  |
Class B Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issuance cost |  |  |  |  |  |  |  |  | 500 |  |  |  |
Allocated to warrants |  |  |  |  |  |  |  |  | 3,400 |  |  |  |
Warrants for derivative liability |  |  |  |  |  |  |  |  | 5,800 |  |  |  |
Proceeds from issuance of common stock gross |  |  |  |  |  |  |  |  | 7,000 |  |  |  |
Proceeds from issuance of common stock net |  |  |  |  |  |  |  |  | 3,600 |  |  |  |
Stock issuance cost |  |  |  |  |  |  |  |  | $ 400 |  |  |  |
Class B Units [Member] | Secondary Offering [Member] | Underwriter [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued price per shares | $ / shares |  |  |  |  |  |  | $ 1,000 |  |  |  |  |  |
Number of shares of common stock sold | shares |  |  |  |  |  |  | 7,392 |  |  |  |  |  |
Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash offering costs description |  |  |  |  |  |  |  |  | The Company recorded a non-cash, deemed dividend of $6.3 million ($2.5 and $3.8 million-calculated as $0.4 million in offering costs plus $3.4 million measured as the difference between the stated value and the allocated proceeds) related to a beneficial conversion feature and accretion of a discount on convertible preferred stock. |  |  |  |
Non-cash, deemed dividend |  |  |  |  |  |  |  |  | $ 6,300 |  |  |  |
Offering costs |  |  |  |  |  |  |  |  | 400 |  |  |  |
Proceed from convertible preferred stock |  |  |  |  |  |  |  |  | $ 3,400 |  |  |  |
Convertible Preferred Stock [Member] | Secondary Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock shares conversion | shares |  |  |  |  |  |  |  |  | 616,000 |  |  |  |
Preferred stock, issued | shares |  |  |  |  |  |  |  |  | 7,392 |  |  |  |
Number of common stock received |  |  |  |  |  |  |  |  | $ 400 |  |  |  |
Number of common stock exercise, shares | shares |  |  |  |  |  |  |  |  | 37,208 |  |  |  |
July Through December of 2018 [Member] | Series B Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock shares conversion | shares |  |  |  |  |  |  |  |  | 10,926 |  |  |  |
July Through December of 2018 [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock shares conversion | shares |  |  |  |  |  |  |  |  | 17,098,973 |  |  |  |

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