Quarterly report pursuant to Section 13 or 15(d)

Severance Expense (Details)

v3.19.3
Severance Expense (Details)
$ in Millions
3 Months Ended 12 Months Ended
Jun. 30, 2019
USD ($)
Dec. 31, 2018
USD ($)
position
Restructuring Cost and Reserve [Line Items]    
Number of positions eliminated | position   70
Selling, general and administrative expenses    
Restructuring Cost and Reserve [Line Items]    
Severance expenses | $ $ 2.9 $ 3.1