Income Taxes - Significant Components of Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Deferred tax assets:
Stock-based compensation	$ 1,793	$ 1,864
Net operating loss carryforwards	6,656	5,669
Research credit carryforwards	7,882	7,322
Lease liability	859	856
Other, net	1,117	0
Total deferred assets	18,307	15,711
Deferred tax liabilities:
Right of use asset	(633)	(570)
Intangibles	(18,693)	(8,019)
Other, net	0	1
Total deferred liabilities	(19,326)	(8,588)
Valuation allowance for net deferred tax assets	(2,868)	(729)
Net deferred tax asset (liability)	$ (3,887)
Net deferred tax asset (liability)		$ 6,394