Income and Other Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Federal net operating loss carryforwards	$ 89,236	$ 96,289
Foreign net operating loss carryforwards	1,448	1,372
Income tax credit carryforwards	592	2,510
Inventory reserves	2,397	2,229
Accounts receivable reserves	57	62
Accrued warranty reserve	264	269
State net operating loss carryforwards	6,822	6,356
Stock compensation	1,352	979
Deferred compensation	465	476
Fixed assets and intangibles	202	(497)
ROU lease liability	5,862	3,289
ROU lease assets	(5,724)	(3,195)
Other	2,443	1,372
Total deferred tax assets	105,416	111,511
Valuation allowance	(105,439)	(111,511)
Net deferred tax liabilities	$ (23)	$ 0