Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]
Beginning Balance at Dec. 31, 2017	$ 66.5	$ 0.3	$ 44.1	$ 22.1
Net income (loss)	(0.5)			(0.5)
Payment for taxes related to share settlement of equity awards	(0.4)		(0.4)
Stock compensation expense	0.6		0.6
Ending Balance at Mar. 31, 2018	66.2	0.3	44.3	21.6
Beginning Balance at Dec. 31, 2017	66.5	0.3	44.1	22.1
Net income (loss)	(0.3)
Ending Balance at Jun. 30, 2018	67.0	0.3	44.9	21.8
Beginning Balance at Mar. 31, 2018	66.2	0.3	44.3	21.6
Net income (loss)	0.2			0.2
Stock compensation expense	0.6		0.6
Ending Balance at Jun. 30, 2018	67.0	0.3	44.9	21.8
Beginning Balance at Dec. 31, 2018	62.0	0.3	46.0	15.7
Net income (loss)	(3.2)			(3.2)
Payment for taxes related to share settlement of equity awards	(0.1)		(0.1)
Stock compensation expense	0.5		0.5
Ending Balance at Mar. 31, 2019	59.2	0.3	46.4	12.5
Beginning Balance at Dec. 31, 2018	62.0	0.3	46.0	15.7
Net income (loss)	(13.5)
Ending Balance at Jun. 30, 2019	49.5	0.3	47.0	2.2
Beginning Balance at Mar. 31, 2019	59.2	0.3	46.4	12.5
Net income (loss)	(10.3)			(10.3)
Stock compensation expense	0.6		0.6
Ending Balance at Jun. 30, 2019	$ 49.5	$ 0.3	$ 47.0	$ 2.2