Sale of Algenist and Discontinued Operations Gain On Sale Components (Details) - Algenist skincare - USD ($) $ in Thousands		12 Months Ended
	Aug. 16, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total consideration received	$ 20,200
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received, net of closing costs	18,837
19.9% interest in Algenist at fair value	1,600
Total consideration received	20,437
Net assets sold (primarily working capital)	$ (11,470)
Gain on sale of Algenist before income taxes		$ 8,967	$ 0	$ 0