Goodwill and Other Intangible Assets (Carrying Amount of Goodwill and Other Amortizable Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Other Intangible Assets [Abstract]
Ribasphere product rights, Beginning Balance		$ 15,223
Ribasphere product rights, Amortization		(15,223)	$ (27,442)
Ribasphere product rights, Impairment			(31,300)
Ribasphere product rights, Ending Balance			$ 15,223
Ribasphere product rights, Remaining Useful Life			1 year 3 months
Goodwill, Beginning Balance	3,580	3,580
Goodwill, Impairment	0	0	$ 0
Goodwill, Ending Balance	$ 3,580	$ 3,580	$ 3,580