Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurement - Schedule of Reconciliation of the Beginning and Ending Level 3 Liabilities (Details)

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Fair Value Measurement - Schedule of Reconciliation of the Beginning and Ending Level 3 Liabilities (Details) - Unobservable Inputs Level 3 [Member] - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Balance - January 1 $ 1,476 $ 4,115
Estimated fair value of warrants exchanged for common shares (35)
Change in fair value of warrants for the year ended (571) (1,273)
Balance at March 31, $ 905 $ 2,807