Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Revenue:
Product sales	$ 7,936	$ 8,173	$ 15,637	$ 15,354
Royalties and license fees	7,319	6,697	15,320	14,651
Research, development and other	2,248	1,829	4,307	3,235
Total revenue	17,503	16,699	35,264	33,240
Operating costs and expenses:
Product costs	2,562	2,926	5,190	5,292
Research and development	8,208	4,868	14,178	8,502
Selling, general and administrative	5,076	4,853	9,938	8,501
Acquired intangible asset amortization	591	780	1,187	1,134
Contingent consideration (gain) accretion expense	(611)	392	(174)	501
Acquisition transaction, integration and other costs		640		3,131
Total operating costs and expenses	15,826	14,459	30,319	27,061
Operating income	1,677	2,240	4,945	6,179
Other (loss) income:
Investment income, net	85	16	170	17
Foreign exchange (loss) gain	(201)	(434)	473	(569)
Gains on strategic investments and other		361		361
Other (loss) income, net	(116)	(57)	643	(191)
Income before income taxes	1,561	2,183	5,588	5,988
Income tax provision	(1,055)	(1,362)	(2,782)	(2,514)
Net income	$ 506	$ 821	$ 2,806	$ 3,474
Basic net income per share	$ 0.04	$ 0.06	$ 0.21	$ 0.27
Diluted net income per share	$ 0.04	$ 0.06	$ 0.21	$ 0.26
Weighted average number of shares outstanding:
Basic	13,220	12,969	13,207	12,956
Diluted	13,428	13,190	13,415	13,187