Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock, Common [Member]	Total
Balance at Dec. 31, 2021		$ 1,073.0	$ (1,036.0)	$ (24.9)	$ 12.1
Balance, shares at Dec. 31, 2021	28,097			2,927
Net loss			(2.3)		(2.3)
Balance at Sep. 30, 2022		1,073.0	(1,038.3)	$ (24.9)	9.8
Balance, shares at Sep. 30, 2022	28,097			2,927
Balance at Dec. 31, 2022		1,073.0	(1,039.0)	$ (24.9)	9.1
Balance, shares at Dec. 31, 2022	28,097			2,927
Net loss			(3.3)		(3.3)
Redemption of shares (see Note 11 – Shareholders’ Equity)				$ 1.3	1.3
Redemption of shares (see Note 10 - Shareholders' Equity), shares				7,578
Shares issued to Tacora (see Note 11 – Shareholders’ Equity)				$ (1.3)	(1.3)
Shares issued to Tacora (see Note 10 - Shareholders' Equity) , shares				(7,578)
Balance at Sep. 30, 2023		$ 1,073.0	$ (1,042.3)	$ (24.9)	$ 5.8
Balance, shares at Sep. 30, 2023	28,097			2,927