CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues:
Royalties	$ 8,944	$ 9,564
Miscellaneous income	31	619
Total revenues	8,975	10,183
Operating expenses:
Research and development - pipeline	0	1,579
General and administrative	508	2,949
Restructuring charges	0	2,505
Total operating expenses	508	7,033
Operating income	8,467	3,150
Other income (expense):
Investment income, net	0	427
Interest expense	0	(1,274)
Other, net	109	220
Total other (expense)	109	(627)
Income before income tax expense	8,576	2,523
Income tax expense	55	133
Net income	8,521	2,390
Earnings per common share:
Basic (in dollars per share)	$ 0.19	$ 0.05
Diluted (in dollars per share)	$ 0.19	$ 0.05
Weighted-average shares outstanding - basic (in shares)	44,092	43,693
Weighted-average shares outstanding - diluted (in shares)	44,253	61,118
Available-for-sale marketable securities:
Unrealized holding gains arising during period	0	39
Reclassification adjustment for realized losses on sales included in net income	0	(281)
Total other comprehensive loss		(242)
Comprehensive income	$ 8,521	$ 2,148