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Reverse/Forward Stock Split (Details) $ in Thousands |  | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Nov. 06, 2013 shares | Jun. 30, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Jun. 11, 2013 director
Class of Stock [Line Items] |  |  |  |  |
Number of independent directors | director |  |  |  |  | 3
Stock Issued During Period, Shares, Reverse/Forward Stock Splits | shares | 643,218 |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  | $ 13,600 |
Reserve for unexchanged promotional shares |  | $ 191 |  | $ 13,700 |
Adjustments to Additional Paid in Capital, Stock Split |  | $ 102 | $ 346 |  |
Payments for Repurchase of Common Stock |  |  | $ 13,400 |  |
Reverse Stock Split |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 0.04 |  |  |  |
Forward Stock Split |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 25 |  |  |  |

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