CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Allowance	$ 3.0	$ 3.5
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	250,000,000	250,000,000
Common stock, issued	65,023,174	64,589,075
Common stock, outstanding	65,023,174	64,589,075
Series A convertible preferred stock
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, authorized	10,000,000	10,000,000
Preferred stock, issued	650,000	650,000
Preferred liquidation preference	$ 65.0	$ 65.0