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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2023 | Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net loss | $ (5,323) | $ (6,722)
Adjustments to reconcile net loss to net cash flows used in operating activities: |  |
Depreciation and amortization | 621 | 604
Amortization of operating lease right-of-use asset | 99 | 93
Amortization of finance lease right-of-use asset | 43 | 67
Amortization of deferred financing costs, debt discounts and debt premiums | 1 | 2
Gain on settlement of liability |  | (1)
Stock-based compensation | 802 | 2,683
Provision for losses on doubtful accounts | 124 | 165
Warrant revaluation |  | (519)
Changes in operating assets and liabilities: |  |
Accounts receivable | 28 | (595)
Inventories | 171 | (78)
Other assets | 192 | 207
Accounts payable | 353 | 692
Operating lease liabilities | (97) | (90)
Deferred revenue | (102) | (5)
Accrued expenses | 311 | (483)
Net cash used in operating activities | (2,777) | (3,980)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Purchase of property and equipment | (54) | (106)
Net cash used in investing activities | (54) | (106)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Principal payments on finance lease obligations | (44) | (95)
Issuance of common stock, net of issuance costs | 2,245 |
Principal payments on long-term debt | (242) | (14)
Net cash flows provided by (used in) financing activities | 1,959 | (109)
NET CHANGE IN CASH | (872) | (4,195)
CASH AT BEGINNING OF PERIOD | 3,445 | 11,668
CASH AT END OF PERIOD | 2,573 | 7,473
SUPPLEMENTAL CASH FLOW INFORMATION |  |
Cash paid during the period for interest | 18 | 19
SUPPLEMENTAL DISCLOSURE OF CONSULTING SERVICES OR ANY OTHER NON-CASH COMMON STOCK RELATED ACTIVITY |  |
Purchases of equipment financed through accounts payable | 7 | 7
Operating lease right-of-use assets obtained in exchange for operating lease obligations | $ 58 | $ 92

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