Earnings Per Common Share - Components of Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net loss	$ (4,898)	$ 1,666	$ (5,207)	$ (1,257)
Dividends on preferred stock	810	810	2,430	2,432
Adjusted net loss available to common shareholders	$ (5,708)	$ 856	$ (7,637)	$ (3,689)
Weighted average number of common shares outstanding used in computation of basic earnings per common share (in shares)	16,558	16,395	16,531	13,314
Effect of dilutive securities:
Stock options	0	1	0	0
Weighted average number of common shares outstanding plus effect of dilutive securities - used in computation of diluted earnings per common share (in shares)	16,558	16,396	16,531	13,314
Basic (in dollars per share)	$ (0.34)	$ 0.05	$ (0.46)	$ (0.28)
Diluted (in dollars per share)	$ (0.34)	$ 0.05	$ (0.46)	$ (0.28)