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Common and Preferred Stock (Details) |  |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 15, 2018 USD ($) $ / shares shares | Oct. 10, 2018 shares | Sep. 11, 2017 USD ($) D $ / shares shares | Aug. 05, 2016 USD ($) | Oct. 31, 2018 $ / shares | Jun. 30, 2019 USD ($) $ / shares shares | Jun. 30, 2018 USD ($) shares | Jun. 30, 2019 USD ($) $ / shares shares | Jun. 30, 2018 USD ($) shares | Dec. 31, 2018 USD ($) $ / shares shares
Preferred Stock, Dividend Rate, Percentage |  |  |  |  |  |  |  |  |  | 2.00%
Proceeds from Issuance of Common Stock |  |  |  |  |  |  |  |  |  | $ 12,200,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares | 13,672,173 |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 1.38 |  |  |  | $ 1.38 |  |  |  |  |
Shares Issued, Price Per Share | $ / shares | $ 1.15 |  |  |  |  |  |  |  |  |
Preferred Stock Redemption Discount |  |  |  |  |  |  |  |  |  | $ 9,100,000
Percentage of issue of the public offering |  |  |  |  | 120.00% |  |  |  |  |
Preferred Stock Shares Converted | shares |  |  |  |  |  | 302 |  | 1,338 |  |
Preferred Shares, Unamortized Discount From Conversion |  |  |  |  |  | $ 117,000 |  | $ 515,000 |  |
Conversion of Stock, Shares Converted | shares |  |  |  |  |  |  |  | 7,900 |  |
Common Stock, Discount on Shares |  |  |  |  |  | $ 3,000,000 |  | $ 3,000,000 |  |
Proceeds from Issuance or Sale of Equity | $ 18,600,000 |  |  |  |  |  |  |  |  |
Over-Allotment Option [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | shares | 2,428,825 | 2,428,825 |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares | 2,428,825 | 2,428,825 |  |  |  |  |  |  |  |
Issue of warrants to purchase common stock | shares |  | 1,807,826 |  |  |  |  |  |  |  |
Fbr Capital Markets Co [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | shares |  |  |  |  |  |  | 0 |  | 1,700,000 | 3,500,000
Stock Issued During Period, Value, New Issues |  |  |  | $ 40,000,000 |  |  |  |  |  |
Brokerage Commission percentage |  |  |  | 3.00% |  |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  |  | $ 400,000 |  | $ 400,000 | $ 12,200,000
Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share | $ / shares |  |  |  |  |  | $ 0.001 |  | $ 0.001 |  | $ 0.001
Preferred Stock, Dividend Rate, Percentage |  |  | 2.00% |  |  |  |  |  |  |
Preferred Stock Conversion Price Per Share | $ / shares |  |  | $ 18.90 |  |  |  |  |  |  |
Debt Instrument, Convertible, Threshold Trading Days | D |  |  | 20 |  |  |  |  |  |  |
Debt Instrument, Convertible, Threshold Consecutive Trading Days | D |  |  | 30 |  |  |  |  |  |  |
Dividends Payable, Amount Per Share | $ / shares |  |  | $ 70.00 |  |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Stock Split |  |  | $ 7,875 |  |  |  |  |  |  |
Preferred Stock Dividends, Income Statement Impact |  |  |  |  |  | $ 61,000 | 61,000 | $ 122,000 | 120,000 |
Series A Preferred Stock [Member] | Private Placement [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | shares |  |  | 120,000 |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share | $ / shares |  |  | $ 0.001 |  |  |  |  |  |  |
Proceeds from Issuance of Convertible Preferred Stock |  |  | $ 12,000,000 |  |  |  |  |  |  |
Sale of Stock, Consideration Received Per Transaction |  |  | $ 100 |  |  |  |  |  |  |
Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share | $ / shares | $ 1,000 |  |  |  |  | $ 1,000 |  | $ 1,000 |  | $ 1,000
Preferred Stock Dividends, Income Statement Impact |  |  |  |  |  | $ 117,000 | $ 0 | $ 515,000 | $ 0 |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares | 13,672,173 |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, Issued for Services | $ 1,000 |  |  |  |  |  |  |  |  |
Percentage Exceed Aggregate Number Of Common Stock |  |  |  |  | 4.99% |  |  |  |  |
Percentage Exceed Aggregate Number Of Common Stock Outstanding |  |  |  |  | 9.99% |  |  |  |  |
Increase Decrease in Excess of Other Percentage |  |  |  |  | 9.99% |  |  |  |  |
Conversion of Stock, Shares Converted | shares | 13,672,173 |  |  |  |  |  |  |  |  |
Common Class A [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | shares | 2,520,000 |  |  |  |  |  |  |  |  |
Common Class B [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | shares | 15,723 |  |  |  |  |  |  |  |  |
Preferred Stock Conversion Price Per Share | $ / shares | $ 1.15 |  |  |  |  |  |  |  |  |

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