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Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Jan. 31, 2021 | Jan. 31, 2020
Allowance for doubtful accounts |  |
Allowance for Doubtful Accounts and Allowance for Obsolete Equipment and Inventory [Roll Forward] |  |
Balance at Beginning of Period | $ 4,054 | $ 2,113
Charged to Costs and Expenses | 1,129 | 2,000
Charged to Other Accounts | (43) | 0
Deductions Describe | (3,364) | (59)
Balance at End of Period | 1,776 | 4,054
Allowance for obsolete equipment and inventory |  |
Allowance for Doubtful Accounts and Allowance for Obsolete Equipment and Inventory [Roll Forward] |  |
Balance at Beginning of Period | 1,404 | 1,222
Charged to Costs and Expenses | 321 | 298
Charged to Other Accounts | 1 | 1
Deductions Describe | (66) | (117)
Balance at End of Period | $ 1,660 | $ 1,404

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of decrease in valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column D)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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