Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Accounts receivable, credit losses	$ 0.0	$ 0.5
Common stock, par value (USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	50,000,000	50,000,000
Common stock, shares issued (shares)	10,287,931	6,254,396
Common stock, shares outstanding (shares)	10,206,085	6,175,818
Treasury stock (shares)	81,846	78,578