Net (Loss) Income Per Share (Tables)

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Schedule of Calculation of Basic and Diluted Net (Loss) Income Per Share

The following table sets forth the computation of basic and diluted net (loss) income per share (in millions of dollars, except share and per share amounts):

	Year Ended December 31,
	2022			2021			2020
Numerator:
Net (loss) income	$	(29.6	)	$	(18.5	)	$	28.8
Denominator – Weighted-average common shares    outstanding (in thousands):
Basic		15,906			15,836			15,802
Add: dilutive effect of non-vested common shares,    restricted stock units and performance shares1		—			—			111
Diluted		15,906			15,836			15,913
Net (loss) income per common share, Basic	$	(1.86	)	$	(1.17	)	$	1.82
Net (loss) income per common share, Diluted	$	(1.86	)	$	(1.17	)	$	1.81

1.Quantities in the following discussion are denoted in whole shares. For the years ended December 31, 2022 and December 31, 2021, approximately 139,000 and 213,000 potentially dilutive shares, respectively, were excluded from the computation of net loss per share as their effect would have been anti‑dilutive. A total of 44,000 non-vested RSAs, RSUs and performance shares for the year ended December 31, 2020 were excluded from the weighted-average diluted shares computation as their inclusion would have been anti-dilutive.