Loss Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net loss	$ (2,903)	$ (669)	$ (8,733)	$ (308)
Dividends on preferred stock	810	810	1,620	1,620
Adjusted net loss available to common shareholders	$ (3,713)	$ (1,479)	$ (10,353)	$ (1,928)
Weighted average number of common shares outstanding used in computation of basic loss per common share (in shares)	16,724	16,526	16,699	16,511
Effect of dilutive securities:
Stock options (in shares)	0	3	0	3
Weighted average number of common shares outstanding plus effect of dilutive securities - used in computation of diluted loss per share (in shares)	16,724	16,529	16,699	16,514
Net loss per common share:
Basic (in dollars per share)	$ (0.22)	$ (0.09)	$ (0.62)	$ (0.12)
Diluted (in dollars per share)	$ (0.22)	$ (0.09)	$ (0.62)	$ (0.12)