Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Revenue:
Royalties and license fees	$ 6,610	$ 7,517
Product sales	4,634	4,449
Research and development	672	556
Total revenue	11,916	12,522
Operating costs and expenses:
Product costs	1,590	1,563
Research and development	3,638	2,505
Selling, general and administrative	3,466	3,724
Restructuring charges		609
Total operating costs and expenses	8,694	8,401
Operating income from continuing operations	3,222	4,121
Other income:
Investment income, net	138	184
Other income, net	8
Other income	146	184
Income from continuing operations before income taxes	3,368	4,305
Income tax provision	(1,213)	(1,445)
Income from continuing operations	2,155	2,860
Discontinued operations:
Income (loss) from discontinued operations, net of income taxes	1,605	(9,031)
Loss on sale of discontinued operations, net of income taxes	(1,054)
Income (loss) from discontinued operations	551	(9,031)
Net income (loss)	$ 2,706	$ (6,171)
Basic income (loss) per share:
Continuing operations	$ 0.12	$ 0.16
Discontinued operations	$ 0.03	$ (0.52)
Net income (loss)	$ 0.15	$ (0.36)
Diluted income (loss) per share:
Continuing operations	$ 0.12	$ 0.16
Discontinued operations	$ 0.03	$ (0.52)
Net income (loss)	$ 0.15	$ (0.35)
Weighted average number of shares outstanding:
Basic	17,476	17,383
Diluted	17,528	17,397