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Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 31, 2022 | Jan. 31, 2021 | Jan. 31, 2022 | Jan. 31, 2021 | Apr. 30, 2021
Cash flows from operating activities: |  |  |  |  |
Net loss | $ (5,471) | $ (3,151) | $ (13,721) | $ (9,560) | $ (14,800)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |  |  |
Foreign exchange loss (gain) | (5) | (3) |  | (13) |
Depreciation of fixed assets |  |  | 104 | 106 |
Amortization of intangible assets |  |  | 18 |  |
Amortization of right of use asset |  |  | 211 | 159 |
Loss on disposal of property, plant and equipment |  |  |  | 2 |
Gain on extinguishment of PPP Loan |  |  | (890) |  |
Stock-based compensation | 317 | 115 | 864 | 338 |
Change in fair value of contingent liability |  |  | (60) |  |
Changes in operating assets and liabilities, net of acquisition: |  |  |  |  |
Accounts receivable |  |  | 237 | 105 |
Contract assets |  |  | (217) | 188 |
Inventory |  |  | (193) |  |
Other assets |  |  | 51 | (310) |
Accounts payable |  |  | (165) | (473) |
Accrued expenses |  |  | (589) | 1,192 |
Change in lease liability |  |  | (228) | (169) |
Contract liabilities |  |  | 15 | (90) |
Litigation payable |  |  | (1,224) |  |
Net cash used in operating activities |  |  | (15,787) | (8,525) | (11,700)
Cash flows from investing activities: |  |  |  |  |
Purchase of property, plant and equipment |  |  | (319) | (17) |
Payments for MAR acquisition, net of cash acquired |  |  | (3,544) |  |
Net cash used in investing activities |  |  | (3,863) | (17) |
Cash flows from financing activities: |  |  |  |  |
Proceeds from Paycheck Protection Program Loan |  |  |  | 890 |
Proceeds from loan payable |  |  |  | 467 |
Payments of loan payable |  |  |  | (292) |
Proceeds from stock option exercises |  |  | 90 | 40 |
Proceeds from issuance of common stock- Aspire financing net of issuance costs |  |  |  | 9,983 |
Proceeds from issuance of common stock- AGP At The Market offering, net of issuance costs |  |  |  | 66,166 |
Proceeds associated with exercise of common stock warrants |  |  |  | 769 |
Acquisition of treasury stock |  |  |  | (36) |
Net cash provided by financing activities |  |  | 90 | 77,987 |
Effect of exchange rate changes on cash, cash equivalents and restricted cash |  |  | (14) | 32 |
Net (decrease) / increase in cash, cash equivalents and restricted cash |  |  | (19,574) | 69,477 |
Cash, cash equivalents and restricted cash, beginning of period |  |  | 83,634 | 10,930 | 10,930
Cash, cash equivalents and restricted cash, end of period | $ 64,060 | $ 80,407 | 64,060 | 80,407 | $ 83,634
Supplemental disclosure of noncash operating activities: |  |  |  |  |
Prepaid financing costs reported in accrued expenses |  |  |  | 62 |
Supplemental disclosure of noncash investing and financing activities: |  |  |  |  |
Acquisition of property, plant and equipment through accounts payable |  |  |  | 9 |
Issuance of common stock in acquisition of MAR |  |  | 5,855 |  |
Advance payable – MAR |  |  | 456 |  |
Contingent liability |  |  | 1,591 |  |
Outstanding receivable for sale of shares from warrant exercises |  |  |  | 1,838 |
Outstanding receivable for sale of shares from stock option exercises |  |  |  | $ 144 |

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