CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:
Royalties	$ 8,133	$ 8,828	$ 24,811	$ 26,436
Miscellaneous income	31	0	94	631
Total revenues	8,164	8,828	24,905	27,067
Operating expenses:
Research and development - pipeline	0	653	0	2,525
General and administrative	571	2,259	1,915	7,606
Restructuring charges	0	794	0	3,764
Total operating expenses	571	3,706	1,915	13,895
Operating income	7,593	5,122	22,990	13,172
Other income (expense):
Investment income, net	0	4	0	534
Interest expense	0	0	0	(2,124)
Other, net	0	195	61	1,061
Total other income (expense)	0	199	61	(529)
Income before income tax expense	7,593	5,321	23,051	12,643
Income tax expense (benefit)	1	(241)	56	(28)
Net income	7,592	5,562	22,995	12,671
Available-for-sale marketable securities:
Unrealized holding gains arising during period	0	4	0	238
Reclassification adjustment for realized gains on sales included in net income	0	0	0	(320)
Total other comprehensive loss	0	4	0	(82)
Comprehensive income	$ 7,592	$ 5,566	$ 22,995	$ 12,589
Earnings per common share
Basic (in dollars per share)	$ 0.17	$ 0.13	$ 0.52	$ 0.29
Diluted (in dollars per share)	$ 0.17	$ 0.13	$ 0.52	$ 0.26
Weighted-average shares - basic (in shares)	44,131	43,921	44,109	43,782
Weighted-average shares - diluted (in shares)	44,239	44,137	44,254	53,468
Special cash dividend paid per common share (in dollars per share)	$ 0	$ 0	$ 0	$ 1.60