Earnings 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, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Basic earnings per share (in shares)									17,769,958	17,383,415	17,043,167
Effect of dilutive securities (in shares)									156,366	0	305,289
Diluted earnings per share (in shares)									17,926,324	17,383,415	17,348,456
Securities excluded from the determination of weighted average shares for the calculation of diluted earnings (loss) per share, as they were antidilutive (in shares)									0	886,274	393,970
Basic earnings (loss) per share (in dollars per share)	$ 1.53	$ (0.17)	$ (0.50)	$ (0.84)	$ (2.85)	$ (0.36)	$ (0.37)	$ 0.01	$ 0.04	$ (3.58)	$ 0.29
Effect of dilutive securities (in dollars per share)									0	0	0
Diluted earnings (loss) per share (in dollars per share)	$ 1.52	$ (0.17)	$ (0.50)	$ (0.84)	$ (2.85)	$ (0.36)	$ (0.37)	$ 0.01	$ 0.04	$ (3.58)	$ 0.29