CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues:
U.S. Feraheme product sales, net	$ 17,375	$ 15,578
License fee and other collaboration revenues	3,120	2,003
Other product sales and royalties	340	299
Total revenues	20,835	17,880
Costs and expenses:
Cost of product sales	2,837	2,942
Research and development expenses	6,498	5,404
Selling, general and administrative expenses	17,491	14,005
Total costs and expenses	26,826	22,351
Other income (expense):
Interest expense	(1,476)
Interest and dividend income, net	265	271
Gains on sale of assets	100	299
Gains on investments, net		6
Total other income (expense)	(1,111)	576
Net loss	$ (7,102)	$ (3,895)
Net loss per share:
Basic and diluted (in dollars per share)	$ (0.33)	$ (0.18)
Weighted average shares outstanding used to compute net loss per share:
Basic and diluted (in shares)	21,824	21,544