Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Other Intangible Assets [Abstract]

Carrying Amount of Goodwill and Other Amortizable Intangible Assets

	Balance as of December 31, 2015		Amortization		Impairment		Balance as of December 31, 2016		Remaining Useful Life as of December 31, 2016
Ribasphere product rights	$	15,223	$	(15,223)	$	—	$	—	—
Goodwill	$	3,580	$	—	$	—	$	3,580	—

	Balance as of December 31, 2016		Amortization		Impairment		Balance as of December 31, 2017		Remaining Useful Life as of December 31, 2017
Ribasphere product rights	$	—	$	—	$	—	$	—	—
Goodwill	$	3,580	$	—	$	—	$	3,580	—