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Common and Preferred Stock (Details Textual) - USD ($) |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 07, 2018 | Sep. 11, 2017 | Aug. 05, 2016 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017 | Jun. 30, 2018 | Mar. 31, 2018
Preferred Stock, Dividend Rate, Percentage |  |  |  |  |  | 2.00% |  |  |  |
Preferred Stock Dividends, Income Statement Impact |  |  |  | $ 61,000 | $ 6,901,000 | $ 181,000 | $ 6,901,000 | $ 6,900,000 |  |
Dividends Payable, Current |  |  |  | $ 62,000 |  | $ 62,000 |  | $ 73,000 | $ 60,000 | $ 59,000
Fbr Capital Markets Co [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  | 1,600,000 | 800,000 | 1,700,000 | 11,000,000 |  |  |
Stock Issued During Period, Value, New Issues |  |  | $ 40,000,000 |  |  |  |  |  |  |
Brokerage Commission percentage |  |  | 3.00% |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  | $ 6,000,000 | $ 400,000 | $ 6,400,000 | $ 6,400,000 |  |  |
Fbr Capital Markets Co [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | 1,900,000 |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock | $ 5,800,000 |  |  |  |  |  |  |  |  |
Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  | 2.00% |  |  |  |  |  |  |  |
Preferred Stock Conversion Price Per Share |  | $ 18.90 |  |  |  |  |  |  |  |
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 has 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 |  |  |  |  |  |  |  |
Series A Preferred Stock [Member] | Private Placement [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  | 120,000 |  |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share |  | $ 0.001 |  |  |  |  |  |  |  |
Proceeds from Issuance of Convertible Preferred Stock |  | $ 12,000,000 |  |  |  |  |  |  |  |
Sale of Stock, Consideration Received Per Transaction |  | $ 100 |  |  |  |  |  |  |  |

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