Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Revenue:
Royalties and license fees	$ 7,275	$ 7,465
Product sales	5,847	5,400
Research and development	1,083	1,018
Total revenue	14,205	13,883
Operating costs and expenses:
Product costs	1,902	2,004
Research and development	3,576	3,699
Selling, general and administrative	3,693	3,851
Total operating costs and expenses	9,171	9,554
Operating income	5,034	4,329
Other income:
Investment income, net	57	86
Gain on sale of strategic investment		681
Other losses, net	(7)
Other income	50	767
Income before income taxes	5,084	5,096
Income tax provision	(1,470)	(1,466)
Net income	$ 3,614	$ 3,630
Basic net income per share	$ 0.27	$ 0.26
Diluted net income per share	$ 0.27	$ 0.26
Weighted average number of shares outstanding:
Basic	13,225	13,756
Diluted	13,423	14,009