Income (Loss) Per Common Share - Computation of Weighted Average Basic and Diluted Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Income (loss) from continuing operations	$ (1,100)	$ (2,100)	$ (2,000)	$ (3,800)
Income (loss) from discontinued operations, net of income taxes	500	800	11,000	800
Net income (loss)	$ (600)	$ (1,300)	$ 9,000	$ (3,000)
Weighted average number of common shares outstanding during the period - basic and diluted	5.1	5.1	5.1	5.1
Continuing operations	$ (0.22)	$ (0.41)	$ (0.39)	$ (0.75)
Discontinued operations	0.1	0.16	2.16	0.16
Net gain (loss)	$ (0.12)	$ (0.25)	$ 1.77	$ (0.59)
Anti-dilutive shares excluded from calculation	0.1	0.4	0	0.3