Quarterly report pursuant to Section 13 or 15(d)

Major Customers and Foreign Sales - Schedule of Revenues by Geographic Region (Details)

v3.22.1
Major Customers and Foreign Sales - Schedule of Revenues by Geographic Region (Details) - Net Revenues - Geographic Concentration Risk
6 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 100.00% 100.00%
United States    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 21.00% 24.00%
Other North America    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 9.00% 3.00%
Total North America    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 30.00% 27.00%
China    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 20.00% 28.00%
Malaysia    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 9.00% 5.00%
Taiwan    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 14.00% 20.00%
Other Asia    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 5.00% 8.00%
Total Asia    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 48.00% 61.00%
Germany    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 6.00% 3.00%
Austria    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 9.00% 1.00%
Other Europe    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 7.00% 8.00%
Total Europe    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 22.00% 12.00%