Basis of Presentation - Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share Basic And Diluted [Abstract]
Basic shares	6,275,784	6,307,227
Dilutive shares	420,250	421,000
Diluted shares	6,696,034	6,728,227
Net income	$ 1,361	$ 950
Basic net income per share	$ 0.22	$ 0.15
Diluted net income per share	$ 0.20	$ 0.14