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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Cash flows from operating activities: |  |
Net loss | $ (10,911,000) | $ (10,227,000)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 1,116,000 | 1,436,000
Stock-based compensation | 4,484,000 | 1,711,000
Change in fair value of warrant liability | (8,102,008) | (96,267)
Finance costs related to warrants |  | 1,043,000
Accrued interest | 721,000 | 325,000
Amortization of lease right-of-use assets | 252,000 | 226,000
Change in operating lease liabilities | (236,000) | (248,000)
Amortization of debt discount | 2,091,000 | 627,000
Other | 27,000 | 7,000
Changes in assets and liabilities |  |
Accounts receivable | (848,000) | (4,029,000)
Inventories | (1,418,000) | (166,000)
Prepaid expenses and other assets | 560,000 | (513,000)
Tax credits and receivables | (484,000) | (416,000)
Accounts payable | 804,000 | (26,000)
Deferred revenue and other liabilities | (72,000) | 109,000
Net cash used in operating activities | (12,016,000) | (10,237,000)
Cash flows from investing activities: |  |
Purchases of property and equipment | (71,000) | (38,000)
Purchases of intangible assets | (165,000) |
Proceeds from maturities of marketable securities and investments | 400,000 |
Cash acquired in business combination | 6,464,000 |
Net cash provided by (used in) investing activities | 6,628,000 | (38,000)
Cash flows from financing activities: |  |
Repayment of loans | (785,000) | (100,000)
Proceeds from exercise of stock options | 37,000 | 8,000
Net proceeds from loan facility | 1,262,000 | 573,000
Net proceeds from convertible debentures | 9,055,000 | 3,452,000
Net cash provided by financing activities | 9,569,000 | 10,083,000
Net increase (decrease) in cash and cash equivalents | 4,181,000 | (192,000)
Cash and cash equivalents at beginning of year | 1,712,000 | 1,904,000
Cash and cash equivalents at end of year | $ 5,893,000 | 1,712,000
Debtor-in-Possession |  |
Cash flows from financing activities: |  |
Net proceeds from loan facility |  | $ 6,150,000

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