Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2017

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The following reconciliation represents the change in fair value of the embedded conversion feature of the New Convertible Notes between December 31, 2016 and June 30, 2017:

	Derivative liability for embedded conversion feature
Fair value as of December 31, 2016	$	403
Mark-to-market adjustment on conversion feature(a)	146
Adjustment to write-off conversion feature to reorganization items, net	(549		)
Fair value as of June 30, 2017	$	—

^(a) Mark-to-market adjustment is recognized in unrealized loss on embedded debt conversion option in the Condensed Consolidated Statements of Operations and Comprehensive Loss for the six months ended June 30, 2017.

Measurement of assets and liabilities at fair value on a recurring basis

Convertible Notes Due in 2019 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]