Earnings (Loss) Per Share - Basic and Diluted (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basic:
Basic (in shares)	28,309,004	27,941,814	28,243,400	27,867,090
Effect of dilutive securities:
Common stock options (in shares)	235,006	0	231,032	0
Total weighted average shares outstanding assuming dilution (in shares)	28,544,010	27,941,814	28,474,432	27,867,090
Shares of common stock issued from the exercise of stock options (in shares)	84,705	55,953	231,470	159,808