Stockholders' Equity - Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Equity [Abstract]
Shares, Outstanding at beginning of period	2,768,466
Shares, Granted	300,998
Shares, Exercised	(39,270)
Shares, Forfeited	(1,357,648)
Shares, Outstanding at end of period	1,672,546	2,768,466
Shares, Vested and expected to vest at end of period	1,672,546
Shares, Options exercisable at end of period	1,154,773
Weighted Average Exercise Price, Outstanding at beginning of period	$ 2.14
Weighted Average Exercise Price, Granted	2.74
Weighted Average Exercise Price, Exercised	3.04
Weighted Average Exercise Price, Forfeited	2.42
Weighted Average Exercise Price, Outstanding at end of period	2.00	$ 2.14
Weighted Average Exercise Price, Vested and expected to vest at end of period	2.00
Weighted Average Exercise Price, Options exercisable at end of period	$ 2.12
Weighted Average Remaining Contractual Term, Outstanding at beginning of period	5 years 7 months 20 days	8 years 10 days
Weighted Average Remaining Contractual Term, Vested and expected to vest at end of period	5 years 7 months 20 days
Weighted Average Remaining Contractual Term, Options exercisable at end of period	4 years 4 months 28 days
Aggregate Intrinsic Value, Outstanding	$ 6,430,232
Aggregate Intrinsic Value, Outstanding		$ 6,430,232