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v3.22.2.2

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
--- | ---
May 31, 2022 | May 31, 2021
Cash flows from operating activities: |  |
Net loss | $ (4,531,044) | $ (7,446,254)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 339,096 | 138,267
Loss on disposal of property and equipment | 52,587 |
Provision for allowance on accounts receivable | (684,184) | 766,434
Inventory reserve | (771,736) | 1,550,594
Stock option expense | 1,260,195 | 1,354,609
Amortization of right-of-use asset | 255,725 | 237,588
Changes in assets and liabilities: |  |
Accounts receivable | 1,365,417 | (455,614)
Inventories | 1,561,544 | (1,906,013)
Prepaid expenses and other | 50,007 | 1,138,793
Reduction in lease liability | (244,412) | (241,132)
Other assets | 168,563 | (95,958)
Accounts payable and accrued expenses | 388,992 | (403,331)
Accrued compensation | 258,048 | 110,269
Advance from customers | 50,670 |
Net cash used in operating activities | (480,532) | (5,251,748)
Cash flows from investing activities: |  |
Expenditure related to intangibles | (113,436) | (159,727)
Purchases of property and equipment | (56,900) | (135,856)
Net cash used in investing activities | (170,336) | (295,583)
Cash flows from financing activities: |  |
Gross proceeds from sale of common stock | 2,401,734 | 1,177,394
Costs from sale of common stock | (84,574) | (165,919)
Proceeds from exercise of stock options | 77,360 | 102,255
Net cash provided by financing activities | 2,394,520 | 1,113,730
Effect of exchange rate changes in cash | (25,980) | (8,115)
Net increase (decrease) in cash and cash equivalents | 1,717,672 | (4,441,716)
Cash and cash equivalents at beginning of year | 4,199,311 | 8,641,027
Cash and cash equivalents at end of year | 5,916,983 | 4,199,311
Cash paid during the year for: |  |
Income taxes | 23,719 | 27,171
Non-cash investing and financing activities: |  |
Increase in right-of-use asset due to lease extension or establishment | 4,478 | 79,159
Increase in lease liability due to lease extension or establishment | 4,478 | 79,159
Write off of fixed assets, cost | 819,931 |
Write off of fixed assets, accumulated depreciation | 767,344 |
Write off of intangible assets, cost | 246,756 |
Write off of intangible assets, accumulated amortization | $ 37,221 |

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