Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 1,188	$ 810
Common stock, par value per share (in dollars per share)	$ 0.000005	$ 0.000005
Common stock, shares authorized (in shares)		1,000,000,000
Common stock, shares issued (in shares)	82,882,424	77,793,540
Common stock, shares outstanding (in shares)	82,882,424	77,793,540