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Goodwill and Other Intangible Assets - Schedule of Net Carrying Amount (Detail) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jul. 31, 2021 | Jan. 31, 2021 | Jan. 31, 2020
Finite-Lived Intangible Assets [Line Items] |  |  |
Goodwill, Gross Carrying Amount | $ 7,060 | $ 7,060 | $ 7,060
Goodwill, Accumulated Impairment | (7,060) | (7,060) | (4,529)
Goodwill, Net Carrying Amount |  | 0 | 2,531
Gross Carrying Amount | 18,692 | 18,253 | 19,688
Accumulated Amortization | (11,477) | (10,743) | (10,792)
Accumulated Impairment | (760) | (760) | (760)
Net Carrying Amount | $ 6,455 | $ 6,750 | 8,136
Proprietary rights |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life (in years) | 6 years 4 months 24 days | 7 years 2 months 12 days |
Gross Carrying Amount | $ 8,220 | $ 7,781 | 9,247
Accumulated Amortization | (3,920) | (3,688) | (4,950)
Net Carrying Amount | $ 4,300 | $ 4,093 | 4,297
Customer relationships |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life (in years) | 4 months 24 days | 9 months 18 days |
Gross Carrying Amount | $ 5,024 | $ 5,024 | 5,024
Accumulated Amortization | (4,748) | (4,513) | (3,831)
Net Carrying Amount | $ 276 | $ 511 | 1,193
Patents |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life (in years) | 3 years 1 month 6 days | 3 years 7 months 6 days |
Gross Carrying Amount | $ 2,440 | $ 2,440 | 2,440
Accumulated Amortization | (1,653) | (1,528) | (1,277)
Net Carrying Amount | $ 787 | $ 912 | 1,163
Trade name |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life (in years) | 4 years 9 months 18 days | 5 years 3 months 18 days |
Gross Carrying Amount | $ 894 | $ 894 | 894
Accumulated Amortization | (80) | (74) | (63)
Accumulated Impairment | (760) | (760) | (760)
Net Carrying Amount | $ 54 | $ 60 | 71
Developed technology |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life (in years) | 4 years 4 months 24 days | 4 years 10 months 24 days |
Gross Carrying Amount | $ 1,430 | $ 1,430 | 1,430
Accumulated Amortization | (798) | (727) | (584)
Net Carrying Amount | $ 632 | $ 703 | 846
Other |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life (in years) | 2 years 9 months 18 days | 3 years 4 months 24 days |
Gross Carrying Amount | $ 684 | $ 684 | 653
Accumulated Amortization | (278) | (213) | (87)
Net Carrying Amount | $ 406 | $ 471 | $ 566

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