Annual report pursuant to Section 13 and 15(d)

Investments (Details)

v3.19.3
Investments (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Jan. 31, 2018
Sep. 30, 2018
Dec. 31, 2018
Aug. 31, 2016
Convertible Debt Securities | WayBlazer Note        
Schedule of Investments [Line Items]        
Payments to acquire notes receivable $ 2.0      
Note receivable interest rate 8.00%      
Other assets | Series A-1 | Convertible Preferred Stock | Compstak        
Schedule of Investments [Line Items]        
Carrying value of investment     $ 3.0  
Maximum | Series A-1 | Convertible Preferred Stock | Compstak        
Schedule of Investments [Line Items]        
Investment ownership percentage (less than)       20.00%
Interest expense and other | WayBlazer Note        
Schedule of Investments [Line Items]        
Other nonoperating expense   $ 2.0