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Net Income (Loss) Per Share - Summary of Computation of Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator:
Net income (loss)	$ 237	$ (1,202)
Denominator:
Weighted average common shares outstanding - basic	9,869	9,690
Plus dilutive effect of potential common shares	970	0
Weighted average common shares outstanding - diluted	10,839	9,690
Net income (loss) per share:
Basic	$ 0.02	$ (0.12)
Diluted	$ 0.02	$ (0.12)

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