Summary of Business and Significant Accounting Policies (Computation of Basic and Diluted Loss Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Accounting Policies [Abstract]
Net income (loss)	$ 2,382	$ (1,614)
Weighted-average shares — basic	15,590,000	15,421,000
Dilutive effect of common stock equivalents from equity incentive plans	104,000	0
Weighted-average shares — diluted	15,694,000	15,421,000
Basic	$ 0.15	$ (0.10)
Diluted	$ 0.15	$ (0.10)
Shares of common stock equivalents excluded from computation of diluted net income per share (in shares)		149,000