Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue:
Total revenue	$ 24,854	$ 23,873	$ 73,963	$ 81,165
Operating costs and expenses:
Cost, Product and Service [Extensible Enumeration]	Product Sales [Member]	Product Sales [Member]	Product Sales [Member]	Product Sales [Member]
Product costs	$ 5,141	$ 5,105	$ 14,745	$ 13,018
Research and development	12,975	12,246	38,350	36,003
Selling, general and administrative	12,854	7,885	33,159	22,815
Acquired intangible asset amortization	1,024	560	3,184	1,676
Acquisition transaction, integration and other costs		461		461
Contingent consideration expense	3		9
Total operating costs and expenses	31,997	26,257	89,447	73,973
Operating (loss) income	(7,143)	(2,384)	(15,484)	7,192
Other expense:
Investment income, net	22	26	73	95
Interest expense	(145)	(59)	(410)	(178)
Foreign exchange gain (loss)	85	(94)	120	(201)
Other expense	(38)	(127)	(217)	(284)
(Loss) income before income taxes	(7,181)	(2,511)	(15,701)	6,908
Income tax benefit (provision)	1,530	(776)	3,155	(2,382)
Net (loss) income	$ (5,651)	$ (3,287)	$ (12,546)	$ 4,526
Basic net loss (income) per share	$ (0.41)	$ (0.24)	$ (0.90)	$ 0.33
Diluted net loss (income) per share	$ (0.41)	$ (0.24)	$ (0.90)	$ 0.32
Weighted average number of shares outstanding:
Basic	13,929	13,837	13,907	13,740
Diluted	13,929	13,837	13,907	13,959
Product Sales [Member]
Revenue:
Total revenue	$ 13,919	$ 12,084	$ 40,227	$ 33,969
Royalties and License Fees [Member]
Revenue:
Total revenue	8,795	8,796	26,738	38,182
Research, Development and Other [Member]
Revenue:
Total revenue	$ 2,140	$ 2,993	$ 6,998	$ 9,014