Quarterly report pursuant to Section 13 or 15(d)

Revenue - Additional Information (Details)

v3.19.2
Revenue - Additional Information (Details) - Sales - Customer
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Number of customers that accounted for approximately 10% or more of revenue 1 4 3 2
Percentage of benchmark 65.00% 69.00% 68.00% 37.00%