Earnings (Loss) Per Share - Basic and Diluted (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Basic:
Weighted average shares outstanding, basic	30,122,362	29,322,054	28,518,353
Effect of dilutive securities:
Common stock options	0	0	0
Total weighted average shares outstanding assuming dilution	30,122,362	29,322,054	28,518,353