Earnings (Loss) Per Share - Basic and Diluted (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Basic:
Weighted average shares outstanding	28,518,353	28,029,936	27,536,967
Effect of dilutive securities:
Common stock options	0	324,344	0
Total weighted average shares outstanding assuming dilution	28,518,353	28,354,280	27,536,967
Shares of common stock issued from the exercise of stock options	488,303	229,551	13,850