Net Loss Per Share - Summary of Computation of Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net loss	$ (3,069)	$ (261)	$ (5,441)	$ (2,199)
Denominator:
Basic weighted average common shares outstanding	10,082	9,710	9,993	9,694
Plus dilutive effect of potential common shares	0	0	0	0
Diluted weighted average common shares outstanding	10,082	9,710	9,993	9,694
Net loss per share:
Basic	$ (0.30)	$ (0.03)	$ (0.54)	$ (0.23)
Diluted	$ (0.30)	$ (0.03)	$ (0.54)	$ (0.23)