Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Revenue:
Product sales	$ 8,088	$ 7,701
Royalties and license fees	7,076	8,001
Research, development and other	1,849	2,059
Total revenue	17,013	17,761
Operating costs and expenses:
Product costs	2,891	2,628
Research and development	7,831	5,970
Selling, general and administrative	5,188	4,862
Acquired intangible asset amortization	618	596
Contingent consideration expense	1,118	437
Total operating costs and expenses	17,646	14,493
Operating (loss) income	(633)	3,268
Other income:
Investment income, net	121	85
Foreign exchange (loss) gain	(186)	674
Gain on strategic investment	177
Other income, net	112	759
(Loss) income before income taxes	(521)	4,027
Income tax provision	(1,035)	(1,727)
Net (loss) income	$ (1,556)	$ 2,300
Basic net (loss) income per share	$ (0.12)	$ 0.17
Diluted net (loss) income per share	$ (0.12)	$ 0.17
Weighted average number of shares outstanding:
Basic	13,064	13,200
Diluted	13,064	13,446