Basic and Diluted Net Income (Loss) Per Share - Computation of Basic and Diluted Net Income (Loss) Per Share of Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jul. 31, 2022	Apr. 30, 2022	Jul. 31, 2021	Apr. 30, 2021	Jul. 31, 2022	Jul. 31, 2021
Numerator
Net income (loss)	$ 338	$ (766)	$ (439)	$ (887)	$ (428)	$ (1,326)
Denominator
Basic weighted average common shares	24,388,275		23,359,715		24,254,465	23,209,151
Potentially dilutive shares from equity plans	485,489
Diluted weighted-average common shares	24,873,764		23,359,715		24,254,465	23,209,151
Basic net income (loss) per share	$ 0.01		$ (0.02)		$ (0.02)	$ (0.06)
Diluted net income (loss) per share	$ 0.01		$ (0.02)		$ (0.02)	$ (0.06)