Net Loss Per Share - Schedule of Calculation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net loss	$ (13.8)	$ 8.1	$ (22.4)	$ 4.5	$ (5.7)	$ (17.9)
Denominator – Weighted-average common shares outstanding (in thousands):
Basic	15,899		15,835		15,883	15,820
Diluted	15,899		15,835		15,883	15,820
Net loss per common share, Basic:	$ (0.87)		$ (1.42)		$ (0.36)	$ (1.13)
Net loss per common share, Diluted:	$ (0.87)		$ (1.42)		$ (0.36)	$ (1.13)