Description of Business and Basis of Presentation (Details Textual) - USD ($) $ / shares in Units, $ in Millions |
Jan. 05, 2018 |
Oct. 05, 2017 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|---|---|
| Stockholders' Equity, Reverse Stock Split | 1-for-10 | |||
| Common Stock, Par or Stated Value Per Share | $ 0.001 | $ 0.001 | $ 0.001 | |
| Subsequent Event [Member] | ||||
| Proceeds from Divestiture of Businesses and Interests in Affiliates | $ 29 |