Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Revenue:
Royalties and license fees	$ 6,697	$ 7,383	$ 14,651	$ 14,658
Product sales	8,173	5,651	15,354	11,498
Research, development and other	1,829	1,381	3,235	2,464
Total revenue	16,699	14,415	33,240	28,620
Operating costs and expenses:
Product costs	2,926	1,955	5,292	3,857
Research and development	4,868	4,403	8,502	7,979
Selling, general and administrative	4,853	3,974	8,501	7,515
Acquisition transaction, integration and other costs	640		3,131
Acquisition related intangible asset amortization	780	151	1,134	303
Contingent consideration accretion expense	392		501
Total operating costs and expenses	14,459	10,483	27,061	19,654
Operating income	2,240	3,932	6,179	8,966
Other (loss) income:
Investment income, net	16	56	17	113
Foreign exchange loss	(434)		(569)
Other income, net	361	543	361	536
Other (loss) income, net	(57)	599	(191)	649
Income before income taxes	2,183	4,531	5,988	9,615
Income tax provision	(1,358)	(1,480)	(2,650)	(2,950)
Net income	$ 825	$ 3,051	$ 3,338	$ 6,665
Basic net income per share	$ 0.06	$ 0.24	$ 0.26	$ 0.51
Diluted net income per share	$ 0.06	$ 0.23	$ 0.25	$ 0.50
Weighted average number of shares outstanding:
Basic	12,969	12,944	12,956	13,092
Diluted	13,190	13,207	13,187	13,365