Debt - Senior Secured Convertible Notes (Details) - USD ($) $ in Millions	Dec. 31, 2019	Sep. 30, 2019	Jun. 28, 2019	May 21, 2019
Senior Secured Convertible Notes - May 2019
Debt
Note Principal Amount				$ 2.4
Original Issue Discount				$ (0.5)
Senior Secured Convertible Notes
Debt
Note Principal Amount		$ 5.3
Original Issue Discount	$ (0.8)
Senior Secured Convertible Notes - June 2019
Debt
Note Principal Amount			$ 2.9
Original Issue Discount			$ (0.4)