Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenue:
Total revenue	$ 24,933	$ 23,003
Operating costs and expenses:
Cost, Product and Service [Extensible Enumeration]	Product Sales [Member]	Product Sales [Member]
Product costs	$ 5,267	$ 4,497
Research and development	12,743	11,663
Selling, general and administrative	13,236	9,192
Acquired intangible asset amortization	913	1,089
Contingent consideration expense	3	3
Total operating costs and expenses	32,162	26,444
Operating loss	(7,229)	(3,441)
Other expense:
Interest expense, net	(826)	(136)
Foreign exchange (loss) gain	(125)	33
Investment income, net	172	26
Other expense	(779)	(77)
Loss before income taxes	(8,008)	(3,518)
Income tax benefit	165	706
Net loss	$ (7,843)	$ (2,812)
Basic net loss per share	$ (0.56)	$ (0.20)
Diluted net loss per share	$ (0.56)	$ (0.20)
Weighted average number of shares outstanding:
Basic	13,983	13,878
Diluted	13,983	13,878
Product Sales [Member]
Revenue:
Total revenue	$ 14,234	$ 12,344
Royalties and License Fees [Member]
Revenue:
Total revenue	8,765	8,099
Research, Development and Other [Member]
Revenue:
Total revenue	$ 1,934	$ 2,560