Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Revenue:
Royalties and license fees	$ 33,203	$ 31,763	$ 30,277
Product sales	30,999	24,925	22,798
Research, development and other	7,164	5,210	4,364
Total revenue	71,366	61,898	57,439
Operating costs and expenses:
Product costs	10,908	8,619	8,016
Research and development	18,498	16,165	15,550
Selling, general and administrative	18,000	14,906	14,691
Acquisition transaction, integration and other costs	3,187
Acquired intangible asset amortization	2,422	619	606
Contingent consideration accretion expense	1,492
Claim settlement		2,500
Total operating costs and expenses	54,507	42,809	38,863
Operating income from continuing operations	16,859	19,089	18,576
Other income (loss):
Investment income, net	63	156	238
Foreign exchange loss	(481)
Impairment losses on strategic investments		(1,500)	(1,184)
Gains on strategic investments and other	507	496	842
Other income (loss)	89	(848)	(104)
Income from continuing operations before income taxes	16,948	18,241	18,472
Income tax provision	(6,963)	(6,294)	(6,265)
Income from continuing operations	9,985	11,947	12,207
Discontinued operations:
Loss from discontinued operations, net of income taxes			(176)
Loss from discontinued operations			(176)
Net income	$ 9,985	$ 11,947	$ 12,031
Basic income (loss) per share:
Continuing operations	$ 0.77	$ 0.92	$ 0.90
Discontinued operations			(0.01)
Net income	0.77	0.92	0.88
Diluted income (loss) per share:
Continuing operations	0.76	0.90	0.88
Discontinued operations			(0.01)
Net income	$ 0.76	$ 0.90	$ 0.87
Weighted average number of shares outstanding:
Basic	12,998	13,029	13,632
Diluted	13,219	13,289	13,876