Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Revenue:
Royalties and license fees	$ 27,445	$ 30,385	$ 33,843
Product sales	20,742	20,150	17,364
Research and development	3,741	2,221	3,281
Total revenue	51,928	52,756	54,488
Operating costs and expenses:
Product costs	7,418	6,750	6,806
Research and development	14,143	14,005	18,972
Selling, general and administrative	14,025	14,862	12,509
Restructuring charges	0	1,616	1,204
Asset impairment charges			3,006
Total operating costs and expenses	35,586	37,233	42,497
Operating income from continuing operations	16,342	15,523	11,991
Other (loss) income:
Investment income, net	540	627	1,022
Impairment loss on investments	(804)		(7,943)
Other income, net	228	379	314
Other (loss) income	(36)	1,006	(6,607)
Income from continuing operations before income taxes	16,306	16,529	5,384
Income tax provision	(6,177)	(5,604)	(4,979)
Income from continuing operations	10,129	10,925	405
Discontinued operations:
Income (loss) from discontinued operations, net of income taxes	1,176	(29,431)	(21,494)
Loss on sale of discontinued operations, net of income taxes	(1,074)
Income (loss) from discontinued operations	102	(29,431)	(21,494)
Net income (loss)	$ 10,231	$ (18,506)	$ (21,089)
Basic income (loss) per share:
Continuing operations	$ 0.58	$ 0.63	$ 0.02
Discontinued operations	$ 0.01	$ (1.69)	$ (1.24)
Net income (loss)	$ 0.59	$ (1.06)	$ (1.21)
Diluted income (loss) per share:
Continuing operations	$ 0.58	$ 0.63	$ 0.02
Discontinued operations	$ 0.01	$ (1.69)	$ (1.24)
Net income (loss)	$ 0.59	$ (1.06)	$ (1.21)
Weighted average number of shares outstanding:
Basic	17,318	17,419	17,372
Diluted	17,431	17,462	17,380