Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Revenue:
Product sales	$ 32,790	$ 30,999	$ 24,925
Royalties and license fees	31,787	33,203	31,763
Research, development and other	8,535	7,164	5,210
Total revenue	73,112	71,366	61,898
Operating costs and expenses:
Product costs	11,422	10,908	8,619
Research and development	31,817	18,498	16,165
Selling, general and administrative	20,478	18,000	14,906
Acquisition transaction, integration and other costs		3,187
Acquired intangible asset amortization	2,419	2,422	619
Contingent consideration accretion (gain) expense	(127)	1,492
Claim settlement			2,500
Total operating costs and expenses	66,009	54,507	42,809
Operating income	7,103	16,859	19,089
Other (loss) income:
Investment income, net	390	63	156
Foreign exchange loss	(504)	(481)
Impairment loss on strategic investment			(1,500)
Gains on strategic investments and other	44	507	496
Other (loss) income	(70)	89	(848)
Income before income taxes	7,033	16,948	18,241
Income tax provision	(3,107)	(6,963)	(6,294)
Net income	$ 3,926	$ 9,985	$ 11,947
Basic net income per share:	$ 0.30	$ 0.77	$ 0.92
Diluted net income per share:	$ 0.29	$ 0.76	$ 0.90
Weighted average number of shares outstanding:
Basic	13,153	12,998	13,029
Diluted	13,389	13,219	13,289