Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Major Customers and Foreign Sales - Schedule of Revenues by Geographic Region (Details) - Net Revenues - Geographic Concentration Risk
9 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 100.00% 100.00%
United States    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 31.00% 36.00%
Other North America    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 6.00% 5.00%
Total North America    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 37.00% 41.00%
China    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 25.00% 18.00%
Malaysia    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 4.00% 5.00%
Taiwan    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 15.00% 10.00%
Other Asia    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 7.00% 6.00%
Total Asia    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 51.00% 39.00%
Germany    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 3.00% 9.00%
Other Europe    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 9.00% 11.00%
Total Europe    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 12.00% 20.00%