Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Revenue:
Royalties and license fees	$ 29,774	$ 27,445	$ 30,385
Product sales	22,506	20,742	20,150
Research and development	3,852	3,741	2,221
Total revenue	56,132	51,928	52,756
Operating costs and expenses:
Product costs	7,898	7,418	6,750
Research and development	15,079	14,143	14,005
Selling, general and administrative	13,859	14,025	14,862
Restructuring Charges	476		1,616
Total operating costs and expenses	37,312	35,586	37,233
Operating income from continuing operations	18,820	16,342	15,523
Other income (loss):
Investment income, net	268	540	627
Impairment losses on strategic investments	(158)	(804)
Gains on sale of strategic investments	1,293
Other income, net	137	228	379
Other income (loss)	1,540	(36)	1,006
Income from continuing operations before income taxes	20,360	16,306	16,529
Income tax provision	(5,781)	(6,177)	(5,604)
Income from continuing operations	14,579	10,129	10,925
Discontinued operations:
Income (loss) from discontinued operations, net of income taxes	588	1,176	(29,431)
Loss on sale of discontinued operations, net of income taxes		(1,074)
Income (loss) from discontinued operations	588	102	(29,431)
Net income (loss)	$ 15,167	$ 10,231	$ (18,506)
Basic income (loss) per share:
Continuing operations	$ 1.01	$ 0.58	$ 0.63
Discontinued operations	$ 0.04	$ 0.01	$ (1.69)
Net income (loss)	$ 1.05	$ 0.59	$ (1.06)
Diluted income (loss) per share:
Continuing operations	$ 0.99	$ 0.58	$ 0.63
Discontinued operations	$ 0.04	$ 0.01	$ (1.69)
Net income (loss)	$ 1.03	$ 0.59	$ (1.06)
Weighted average number of shares outstanding:
Basic	14,464	17,318	17,419
Diluted	14,731	17,431	17,462