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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jul. 31, 2021 | Jul. 31, 2020
Cash flows from operating activities: |  |
Net loss | $ (6,644) | $ (13,246)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
PPP loan forgiveness | (850) | 0
Depreciation and amortization | 1,226 | 3,210
Stock-based compensation | 236 | 449
Impairment of intangible assets | 0 | 2,531
Loss on disposal of discontinued operations | 0 | 1,859
(Recovery) provision for doubtful accounts, net of charge offs | (453) | 470
Provision for inventory obsolescence | 350 | 234
Gross profit from sale of lease pool equipment | 0 | (1,326)
Gross profit from sale of other equipment | (155) | 0
Deferred tax expense | 0 | 263
Changes in: |  |
Accounts receivable | (140) | 4,404
Unbilled revenue | 21 | (9)
Inventories | (542) | (675)
Prepaid expenses and other current and long-term assets | (260) | 766
Income taxes receivable and payable | (63) | 0
Accounts payable, accrued expenses and other current liabilities | 375 | (1,583)
Deferred revenue | (292) | 87
Net cash used in operating activities | (7,191) | (2,566)
Cash flows from investing activities: |  |
Purchases of seismic equipment held for lease | 0 | (110)
Purchases of property and equipment | (14) | (302)
Sale of used lease pool equipment | 0 | 2,010
Sale of assets held for sale | 484 | 0
Sale of a business | 761 | 0
Net cash provided by investing activities | 1,231 | 1,598
Cash flows from financing activities: |  |
Purchase of treasury stock | (2) | 0
Net proceeds from preferred stock offering | 4,502 | 0
Net proceeds from common stock offering | 43 | 0
Preferred stock dividends | (1,160) | (1,118)
Proceeds from PPP loans | 0 | 1,607
Net cash provided by financing activities | 3,383 | 489
Effect of changes in foreign exchange rates on cash, cash equivalents and restricted cash | 22 | (117)
Net decrease in cash, cash equivalents and restricted cash | (2,555) | (596)
Cash, cash equivalents and restricted cash, beginning of period | 4,611 | 3,234
Cash, cash equivalents and restricted cash, end of period | 2,056 | 2,638
Supplemental cash flow information: |  |
Interest paid | 18 | 23
Income taxes paid | $ 147 | $ 246

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