Ferring Asset Purchase Agreement and Discontinued Operations - Operating Results of Discontinued Operations (Details) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended		9 Months Ended
	Mar. 08, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale				$ 12,317
Income (loss) from discontinued operations		$ 177	$ 305	11,917	$ 210
Discontinued Operations, Held-for-sale or Disposed of by Sale | Product Business outside the U.S.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Product sales	$ 100	0	172	143	541
Royalty revenue		0	195	368	866
License fee revenue		0	3,950	0	4,000
Cost of goods sold	$ (100)	0	(110)	(74)	(436)
Cost of Sandoz rights		0	(3,380)	0	(3,380)
Operating expenses		(73)	(504)	(821)	(1,363)
Gain on sale		0	(17)	(16)	(17)
Gain on sale		250	0	12,317	0
Income (loss) from discontinued operations		$ 177	$ 306	$ 11,917	$ 211