Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Apr. 30, 2022	Jan. 31, 2022	Apr. 30, 2021
Statement Of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 1,153	$ 1,348	$ 2,155
Preferred shares, par value	$ 0.0001	$ 0.0001	$ 0.0001
Preferred shares, shares authorized	10,000,000	10,000,000	10,000,000
Preferred shares, shares issued	0	0	0
Common shares, par value	$ 0.0001	$ 0.0001	$ 0.0001
Common shares, shares authorized	200,000,000	200,000,000	200,000,000
Common shares, shares issued	94,434,621	96,431,044	98,235,127
Common shares, shares outstanding	94,434,621	96,431,044	98,235,127

Amount of allowance for credit loss on accounts receivable, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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