Debt Convertible Notes (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	May 19, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Convertible Debt, Principal Amount to be Received	$ 700		$ 700
Stock Issued During Period, Value, Conversion of Convertible Securities			15,332,000
New Convertible Notes exchanged, Amount					$ 23,806,000
New Convertible Notes Exchanged, Non Affiliate, Amount					20,866,000
New Convertible Notes Exchange, Affiliate, Amount					2,940,000
Derivative Liability	9,569,000		9,569,000		11,574,000	$ 0
Debt Restructuring (gains) losses, net	(513,000)	$ 0	6,562,000	$ 0
Convertible Notes Due in 2017 [Member]
Debt Instrument [Line Items]
Convertible Debt	41,000		41,000			57,500,000
Estimated fair value of convertible debt	25,000		25,000			21,966,000
Debt Instrument, Convertible, Conversion Rate, Principal Amount of Convertible Notes for Shares, Principal Amount	1,000		1,000
Debt Conversion, Original Debt, Amount			$ 23,443,000
Debt Conversion, Converted Instrument, Shares Issued			7,863
Existing Convertible Notes Exchanged, Amount					$ 34,016,000
Debt Restructuring (gains) losses, net			$ 76,000
Convertible Notes Due in 2019 [Member]
Debt Instrument [Line Items]
Convertible Debt	22,323,000		22,323,000			$ 0
Estimated fair value of convertible debt	$ 6,705,000		$ 6,705,000
Maturity date			Dec. 30, 2019
Debt Instrument, Interest Rate, Stated Percentage	5.25%		5.25%
Debt Instrument, Convertible, Conversion Price	$ 2.25		$ 2.25
Debt Conversion, Original Debt, Amount			$ 1,483,000
Debt Conversion, Converted Instrument, Shares Issued			713
Gains (Losses) on Extinguishment of Debt			$ 589,000