Fair Value Measurements Unobservable Inputs (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014	May 19, 2016
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss)	$ 10,450	[1]	$ 0	$ 0
Derivative Liability	403		0		$ 11,574
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases, (Sales), Issuances, (Settlements)	$ (721)
Convertible Notes Due in 2019 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Share Price	$ 0.25
Fair Value Assumptions, Expected Volatility Rate	97.90%
Fair Value Inputs, Entity Credit Risk	69.80%
Fair Value Assumptions, Risk Free Interest Rate	1.47%
Convertible Notes Due in 2017 [Member] | Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Convertible Debt, Fair Value Disclosures	$ 25		$ 21,966

[1] Mark-to-market adjustment is recognized in unrealized gain on embedded debt conversion option in the Consolidated Statements of Operations and Comprehensive Loss for the year ended December 31, 2016.