Revenue (Revenue and Cost Of Goods Sold By Source) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Geographic Information
Total revenue	$ 19,631	$ 16,146
Cost of goods sold (excluding amortization)	4,627	4,308
Amortization of intangible assets	3,638	3,638
Qsymia
Geographic Information
Total revenue	11,478	8,423
Cost of goods sold (excluding amortization)	1,340	1,382
Amortization of intangible assets	91	91
PANCREAZE
Geographic Information
Total revenue	5,783	5,644
Cost of goods sold (excluding amortization)	1,602	1,461
Amortization of intangible assets	3,547	3,547
STENDRA/SPEDRA
Geographic Information
Total revenue	2,370	2,079
Cost of goods sold (excluding amortization)	1,685	1,465
Net Product Revenue
Geographic Information
Total revenue	14,697	13,497
Net Product Revenue | Qsymia
Geographic Information
Total revenue	8,914	8,423
Net Product Revenue | PANCREAZE
Geographic Information
Total revenue	5,783	5,074
License revenue
Geographic Information
Total revenue	2,000
License revenue | Qsymia
Geographic Information
Total revenue	2,000
Supply Revenue
Geographic Information
Total revenue	1,823	1,604
Supply Revenue | STENDRA/SPEDRA
Geographic Information
Total revenue	1,823	1,604
Royalty Revenue
Geographic Information
Total revenue	1,111	1,045
Royalty Revenue | Qsymia
Geographic Information
Total revenue	564
Royalty Revenue | PANCREAZE
Geographic Information
Total revenue		570
Royalty Revenue | STENDRA/SPEDRA
Geographic Information
Total revenue	$ 547	$ 475