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Stockholders' Equity (Details Textual) |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 15, 2018 USD ($) $ / shares shares | Oct. 10, 2018 $ / shares shares | Sep. 11, 2017 USD ($) $ / shares shares | Oct. 31, 2018 $ / shares | Dec. 31, 2018 USD ($) $ / shares shares | Dec. 31, 2017 USD ($) $ / shares shares
Stockholders Equity [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |  |  |  |  |  | 11,965
Proceeds from Stock Options Exercised | $ |  |  |  |  | $ 0 | $ 166,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares |  | $ 1.38 |  | $ 1.38 |  |
Convertible Preferred Stock, Terms of Conversion |  |  |  | The Company may not effect, and holder will not be entitled to, exercise any Warrants or conversion of the Series B Preferred Stock, which, upon giving effect to such exercise, would cause (i) the aggregate number of shares of common stock beneficially owned by the holder (together with its affiliates) to exceed 4.99% (or, at the election of the holder, 9.99%) of the number of shares of common stock outstanding immediately after giving effect to the exercise, or (ii) the combined voting power of the Company's securities beneficially owned by the holder (together with its affiliates) to exceed 4.99% (or, at the election of the holder, 9.99%) of the combined voting power of all of the Company's securities then outstanding immediately after giving effect to the exercise or conversion, as such percentage ownership is determined in accordance with the terms of the October 2018 Warrants or Series B Preferred Stock. However, any holder may increase or decrease such percentage to any other percentage not in excess of 9.99% upon at least 61 days' prior notice from the holder to the Company. The holders of the Series B Preferred will participate, on an as-if-converted-to-common stock basis, in any dividends to the holders of common stock. Upon a defined Fundamental Transaction, the holders of the Series B Preferred Stock are entitled to the same consideration as are holders of common stock. The Series B Preferred Stock ranks junior to existing Series A preferred stock but on parity with common stock. Liquidation preference is equal to an amount pari passu with the common stock on an as converted basis (i.e., there is no preference to common stock) |  |
Preferred Stock Dividends, Income Statement Impact | $ |  |  |  |  | $ 243,000 | 73,000
Proceeds from Issuance Initial Public Offering | $ | $ 16,700,000 |  |  |  |  |
Shares Issued, Price Per Share | $ / shares | $ 1.15 |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  | 13,672,173 |  |  |  |
Investment Warrants Expiration Date1 |  |  |  | Oct. 15, 2023 |  |
Percentage of issue of the public offering |  |  |  | 120 |  |
Sale of Stock, Number of Shares Issued in Transaction |  |  |  |  | 3,500,000 |
Sale of Stock, Consideration Received on Transaction | $ |  |  |  |  | $ 12,200,000 |
Common Class A [Member] |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | 2,520,000 |  |  |  |  |
Common Class B [Member] |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |
Preferred Stock Conversion Price Per Share | $ / shares | $ 1.15 |  |  |  |  |
Stock Issued During Period, Shares, New Issues | 15,723 |  |  |  |  |
Series A Preferred Stock [Member] |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |
Preferred Stock, Redemption Terms |  |  | (i) the VWAP (as defined in the Certificate of Designation) for at least 20 trading days in any 30 trading day period is greater than $70.00, subject to adjustment in the case of stock split, stock dividends or the like the Company has the right, after providing notice not less than 6 months prior to the redemption date, to redeem, in whole or in part, on a pro rata basis from all holders thereof based on the number of shares of Series A Preferred Stock then held, the outstanding Series A Preferred Stock, for cash, at a redemption price per share of Series A Preferred Stock of $7,875.00, subject to appropriate adjustment in the event of any stock dividend, stock split, combination or other similar recapitalization with respect to the Series A Convertible Preferred Stock or (ii) the five year anniversary of the issue date, the Company shall have the right to redeem, in whole or in part, on a pro rata basis from all holders thereof based on the number of shares of Series A Convertible Preferred Stock then held, the outstanding Series A Preferred Stock, for cash, at a redemption price per share equal to the Liquidation Value. |  |  |
Convertible Preferred Stock, Terms of Conversion |  |  | (i) a 19.99% blocker provision to comply with NYSE American Listing Rules, (ii) if so elected by the Investor, a 4.99% blocker provision that will prohibit beneficial ownership of more than 4.99% of the outstanding shares of the Company’s common stock or voting power at any time, and (iii) applicable regulatory restrictions. |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  | 2.00% |  |  |
Preferred Stock Conversion Price Per Share | $ / shares |  |  | $ 0.54 |  |  |
Preferred Stock Dividends, Income Statement Impact | $ |  |  |  |  | 243,000 | $ 6,962,000
Series B Preferred Stock [Member] |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |  |  |  |  |  | 0
Preferred Stock Dividends, Income Statement Impact | $ |  |  |  |  | $ 11,681,000 | $ 0
Stock Issued During Period, Shares, New Issues |  |  |  |  | 15,723 |
Stock Issued During Period, Value, Issued for Services | $ | $ 1,000 |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share | $ / shares | $ 1,000 |  |  |  | $ 1,000 | $ 1,000
Conversion of Stock, Shares Converted | 13,672,173 |  |  |  |  |
Preferred Stock Redemption Discount | $ |  |  |  |  | $ 9,100,000 |
Preferred Stock, Discount on Shares | $ |  |  |  |  | $ 2,500,000 |
Preferred Stock Shares Converted |  |  |  |  | 6,562 |
Preferred Class A [Member] |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |
Preferred Stock, Convertible, Conversion Price, Increase | $ / shares |  |  | $ 18.90 |  |  |
Fbr Capital Markets Co [Member] |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |
Proceeds from Issuance of Common Stock for Exclusive Channel Collaboration Agreement | $ |  |  |  |  |  | $ 6,400,000
Stock Issued During Period, Shares, New Issues |  |  |  |  | 314,000 |
Warrant [Member] |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 13,672,173 |  |  |  |  |
Private Placement [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |
Proceeds from Issuance of Convertible Preferred Stock | $ |  |  | $ 12,000,000 |  |  |
Sale of Stock, Consideration Received Per Transaction | $ |  |  | $ 100 |  |  |
Stock Issued During Period, Shares, New Issues |  |  | 120,000 |  |  |
Preferred Stock, Par or Stated Value Per Share | $ / shares |  |  | $ 0.001 |  |  |
Over-Allotment Option [Member] |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  | 2,428,825 |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  | 2,428,825 |  |  |  |
Issue of warrants to purchase common stock |  | 1,807,826 |  |  |  |

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