Stockholders’ Deficit (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2017	Mar. 31, 2017	Mar. 31, 2016	Mar. 21, 2017	Feb. 28, 2017	Jan. 31, 2017	Dec. 31, 2016
Subsidiary, Sale of Stock [Line Items]
Proceeds from Issuance of Common Stock		$ 14,585	$ 0
Stock Issued During Period, Shares, New Issues		10.7
Shelf Registration Statement, Maximum Authorized Stock Issuance, Value						$ 75,000	$ 200,000
Shares Issued, Price Per Share				$ 1.27	$ 1.52
Convertible Debt [Member]
Subsidiary, Sale of Stock [Line Items]
Adjustments to Additional Paid IN capital, Cost and Expenses on Derivative Transaction			$ 38,500
Subsequent Event [Member]
Subsidiary, Sale of Stock [Line Items]
Proceeds from Issuance of Common Stock	$ 200
Public Offering [Member]
Subsidiary, Sale of Stock [Line Items]
Shelf Registration Statement, Maximum Authorized Stock Issuance, Value							$ 125,000
Weighted Average [Member]
Subsidiary, Sale of Stock [Line Items]
Shares Issued, Price Per Share		$ 1.43