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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Operating activities |  |
Net loss | $ (2,230) | $ (11,633)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |
Allowance for credit losses | 0 | 170
Inventory allowance | 591 | 81
Amortization of deferred finance and other assets | 150 | 0
Deferred tax expense | 0 | 0
Depreciation and amortization | 1,635 | 1,423
Share-based compensation expense -stock options | 200 | 271
Share-based compensation expense-restricted stock units | 1,143 | 404
Unrealized loss on investment | 740 | 313
(Gain) on sale of equipment | 0 | (1)
Changes in operating assets and liabilities: |  |
Trade accounts receivable | 2,714 | (2,557)
Inventories | (2,437) | (5,208)
Prepaid expenses and other current assets | (314) | 56
Other assets | (279) | (45)
Operating lease ROU assets and lease liabilities | (54) | (38)
Accounts payable | (3,077) | 7,015
Accrued compensation and related taxes | 159 | 44
Accrued warranty expense | 131 | 58
Deferred revenue | 2,921 | 884
Accrued other expenses and other current liabilities | (338) | (237)
Net cash provided by (used in) operating activities | 1,655 | (9,000)
Investing activities |  |
Purchases of property, plant and equipment | (2,117) | (1,750)
Net cash used in investing activities | (2,117) | (1,750)
Financing activities |  |
Dividends paid | 0 | (2,029)
Proceeds from issuance of common stock | 1,063 | 0
Proceeds from issuance of common stock warrants | 1,000 | 0
Proceeds from credit facility and notes payable | 74,908 | 9,722
Repayment of credit facility and notes payable | (74,971) | (5,605)
Net cash provided by financing activities | 2,000 | 2,088
Net change in cash and cash equivalents | 1,538 | (8,662)
Cash and cash equivalents, beginning of year | 1,918 | 10,580
Cash and cash equivalents, end of year | 3,456 | 1,918
Supplemental disclosure |  |
Interest paid | 660 | 190
Non-cash financing activity |  |
Common Stock issued under restricted stock units | 890 | 364
Cashless exercise of stock options and related conversion of net shares to stockholders' equity | $ 4 | $ 0

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