Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Revenue:
Product sales	$ 8,686	$ 7,936	$ 16,774	$ 15,637
Royalties and license fees	8,428	7,319	15,504	15,320
Research, development and other	1,944	2,248	3,793	4,307
Total revenue	19,058	17,503	36,071	35,264
Operating costs and expenses:
Product costs	2,913	2,562	5,804	5,190
Research and development	10,774	8,208	18,605	14,178
Selling, general and administrative	6,440	5,076	11,628	9,938
Acquired intangible asset amortization	636	591	1,254	1,187
Contingent consideration gain	(2,230)	(611)	(1,112)	(174)
Total operating costs and expenses	18,533	15,826	36,179	30,319
Operating income (loss)	525	1,677	(108)	4,945
Other (loss) income:
Investment income, net	142	85	263	170
Foreign exchange (loss) gain	(353)	(201)	(539)	473
Gain on strategic investment			177
Other (loss) income, net	(211)	(116)	(99)	643
Income (loss) before income taxes	314	1,561	(207)	5,588
Income tax benefit (provision)	1,220	(1,055)	185	(2,782)
Net income (loss)	$ 1,534	$ 506	$ (22)	$ 2,806
Basic net income (loss) per share	$ 0.12	$ 0.04	$ 0.00	$ 0.21
Diluted net income (loss) per share	$ 0.11	$ 0.04	$ 0.00	$ 0.21
Weighted average number of shares outstanding:
Basic	13,102	13,220	13,078	13,207
Diluted	13,465	13,428	13,078	13,415