Debt Convertible Notes (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	May 19, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Stock Issued During Period, Value, Conversion of Convertible Securities			$ 15,332,000
Existing Convertible Notes Exchanged, Amount					$ 34,016,000
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	$ 3,284,000		3,284,000		$ 11,574,000	$ 0
Debt Restructuring (gains) losses, net	0	$ 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, Interest Rate, Stated Percentage	7.00%		7.00%
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
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	$ 8,233,000		$ 8,233,000
Maturity date			Dec. 30, 2019
Debt Instrument, Interest Rate, Stated Percentage	5.25%		5.25%
Debt Instrument, Convertible, Conversion Price	$ 2.25		$ 2.25
Convertible Debt, Principal Amount to be Received	$ 700		$ 700
Debt Conversion, Original Debt, Amount			$ 1,483,000
Debt Conversion, Converted Instrument, Shares Issued			713
Gains (Losses) on Extinguishment of Debt			$ 589,000