Major Customers and Sales by Country - Schedule of Revenues by Geographic Region (Details) - Net Revenues - Geographic Concentration Risk	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Revenue, Major Customer [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%
United States
Revenue, Major Customer [Line Items]
Concentration risk, percentage	39.00%	27.00%	22.00%
Other Americas
Revenue, Major Customer [Line Items]
Concentration risk, percentage	9.00%	9.00%	5.00%
Total Americas
Revenue, Major Customer [Line Items]
Concentration risk, percentage	48.00%	36.00%	27.00%
China
Revenue, Major Customer [Line Items]
Concentration risk, percentage	14.00%	17.00%	29.00%
Malaysia
Revenue, Major Customer [Line Items]
Concentration risk, percentage	6.00%	7.00%	3.00%
Taiwan
Revenue, Major Customer [Line Items]
Concentration risk, percentage	5.00%	14.00%	15.00%
Other Asia
Revenue, Major Customer [Line Items]
Concentration risk, percentage	6.00%	6.00%	11.00%
Total Asia
Revenue, Major Customer [Line Items]
Concentration risk, percentage	31.00%	44.00%	58.00%
Czech Republic
Revenue, Major Customer [Line Items]
Concentration risk, percentage	5.00%
Austria
Revenue, Major Customer [Line Items]
Concentration risk, percentage	4.00%	10.00%	3.00%
Germany
Revenue, Major Customer [Line Items]
Concentration risk, percentage	2.00%	4.00%	5.00%
Other Europe
Revenue, Major Customer [Line Items]
Concentration risk, percentage	10.00%	6.00%	7.00%
Total Europe
Revenue, Major Customer [Line Items]
Concentration risk, percentage	21.00%	20.00%	15.00%