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Assets Held for Sale and Discontinued Operations - Schedule of Discontinued Operations, Balance Sheet (Details) - USD ($) $ in Thousands | Jul. 31, 2021 | Jan. 31, 2021 | Jan. 31, 2020
--- | --- | --- | ---
Current assets of discontinued operations: |  |  |
Total assets of discontinued operations | $ 3,312 | $ 4,321 | $ 14,913
Current liabilities of discontinued operations: |  |  |
Total liabilities of discontinued operations | 705 | 963 |
Total liabilities of discontinued operations |  | 1,442 | 2,730
Discontinued Operations, Held-for-sale |  |  |
Current assets of discontinued operations: |  |  |
Accounts receivable, net | 1,151 | 1,668 | 5,699
Inventories, net | 68 | 352 | 605
Prepaid expenses and other current assets | 120 | 150 | 227
Seismic equipment lease pool and property and equipment, net | 1,973 | 2,151 | 8,382
Total assets of discontinued operations | 3,312 | 4,321 | 14,913
Current liabilities of discontinued operations: |  |  |
Accounts payable | 21 | 59 | 884
Deferred revenue | 73 | 73 | 34
Accrued expenses and other current liabilities | 611 | 831 | 1,886
Income taxes payable |  | 479 | (74)
Total liabilities of discontinued operations | $ 705 | 963 |
Total liabilities of discontinued operations |  | $ 1,442 | $ 2,730

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