Quarterly report pursuant to Section 13 or 15(d)

Major Customers and Foreign Sales - Additional Information (Details)

v3.19.3.a.u2
Major Customers and Foreign Sales - Additional Information (Details)
3 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Net Revenues | Customer Concentration Risk | Customer One    
Revenue, Major Customer [Line Items]    
Concentration risk, percentage 11.00% 17.00%