Earnings (Loss) Per Share - Reconciliation of Number of Common Shares Used in Calculation of Basic and Diluted Earnings Per Share (EPS) (Details) - $ / shares	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Basic ((loss) EPS (in shares)									17,043,167	16,711,534	16,654,786
Effect of dilutive securities (in shares)									305,289	0	26,924
Diluted (loss) EPS (in shares)									17,348,456	16,711,534	16,681,710
Securities excluded from the determination of weighted average shares for the calculation of diluted (loss) EPS, as they were antidilutive (in shares)									393,970	1,049,563	1,046,947
Basic (loss) EPS (in dollars per share)	$ 0.33	$ (0.15)	$ 0.07	$ 0.03	$ (0.66)	$ 0.10	$ (0.22)	$ (0.09)	$ 0.29	$ (0.87)	$ 0.67
Effect of dilutive securities (in dollars per share)									0	0	0
Diluted (loss) EPS (in dollars per share)	$ 0.33	$ (0.15)	$ 0.07	$ 0.03	$ (0.66)	$ 0.10	$ (0.22)	$ (0.09)	$ 0.29	$ (0.87)	$ 0.67