Sale of Algenist and Discontinued Operations Narrative (Details) - USD ($) $ in Thousands	3 Months Ended								5 Months Ended	12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Aug. 16, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment	$ 43,856								$ 43,856	$ 43,856
Loss from equity method investments	(5,783)	$ (6,378)	$ (5,358)	$ (4,872)	$ (4,098)	$ (5,916)	$ (7,309)	$ (5,066)		(22,391)	$ (22,389)	$ (23,037)
Algenist skincare
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, consideration, equity, percent													19.90%
Discontinued Operations, Disposed of by Sale | Algenist skincare
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received, net of closing costs													$ 18,837
Algenist Holdings
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment	$ 1,483								1,483	$ 1,483
Loss from equity method investments									$ (100)