Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenue:
Royalties and license fees	$ 7,104	$ 7,478	$ 19,997	$ 22,638
Product sales	5,748	4,966	15,449	14,543
Research and development	1,107	555	2,639	1,674
Total revenue	13,959	12,999	38,085	38,855
Operating costs and expenses:
Product costs	2,251	1,302	5,456	4,714
Research and development	3,503	3,907	10,653	10,212
Selling, general and administrative	3,412	3,533	10,272	10,730
Restructuring charges	0	0	0	609
Total operating costs and expenses	9,166	8,742	26,381	26,265
Operating income from continuing operations	4,793	4,257	11,704	12,590
Other income (loss) :
Investment income, net	137	147	418	498
Impairment loss on investment			(804)
Other income, net	2	171	172	379
Other income (loss)	139	318	(214)	877
Income from continuing operations before income taxes	4,932	4,575	11,490	13,467
Income tax provision	(1,758)	(1,524)	(4,215)	(4,732)
Income from continuing operations	3,174	3,051	7,275	8,735
Discontinued operations:
(Loss) Income from discontinued operations, net of income taxes	(30)	791	1,231	(8,576)
Loss on sale of discontinued operations, net of income taxes	(82)		(1,015)
(Loss) income from discontinued operations	(112)	791	216	(8,576)
Net income	$ 3,062	$ 3,842	$ 7,491	$ 159
Basic income (loss) per share:
Continuing operations	$ 0.18	$ 0.17	$ 0.42	$ 0.50
Discontinued operations	$ (0.01)	$ 0.05	$ 0.01	$ (0.49)
Net income	$ 0.17	$ 0.22	$ 0.43	$ 0.01
Diluted income (loss) per share:
Continuing operations		$ 0.17	$ 0.41	$ 0.50
Discontinued operations	$ (0.01)	$ 0.05	$ 0.01	$ (0.49)
Net income	$ 0.17	$ 0.22	$ 0.43	$ 0.01
Weighted average number of shares outstanding:
Basic	17,528	17,437	17,505	17,409
Diluted	17,647	17,529	17,593	17,456