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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Cash flows from Operating Activities: |  |
Net loss | $ (21,941,000) | $ (9,051,000)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 1,903,000 | 2,736,000
Bad debt expense | 118,000 | 321,000
Non-cash lease expense from right-of-use assets | 349,000 | 495,000
Stock-based compensation | 146,000 | 597,000
Stock-based expense for services | 0 | 390,000
Forfeiture of unvested stock options | (85,000) | 0
Gain on disposal of assets | (2,000) | 0
Gain on extinguishment of liabilities | 0 | (2,675,000)
Casualty loss on inventory | 483,000 | 0
Impairment charges - property and equipment | 61,000 | 98,000
Impairment charges - intangible assets | 5,133,000 | 207,000
Impairment charges - right-of use assets | 179,000 | 0
Impairment charges - goodwill | 7,367,000 | 0
Changes in assets and liabilities: |  |
Accounts receivable | 316,000 | 1,996,000
Prepaid expenses and other current assets | 432,000 | (901,000)
Inventory | 615,000 | (390,000)
Other assets | 69,000 | (3,000)
Accounts payable | (75,000) | (54,000)
Accrued expenses and other current liabilities | 115,000 | (19,000)
Deferred revenue | (614,000) | (559,000)
Lease liabilities | (503,000) | (920,000)
Net cash used in operating activities | (5,934,000) | (7,732,000)
Cash flows from Investing Activities: |  |
Proceeds on sale of equipment | 30,000 | 1,000
Purchases of property and equipment | (11,000) | (50,000)
Net cash provided by (used in) investing activities | 19,000 | (49,000)
Cash flows from Financing Activities: |  |
Proceeds from stock issuance, net of offering costs | 0 | 11,504,000
Net cash provided by financing activities | 0 | 11,504,000
Net (decrease) increase in cash and restricted cash | (5,915,000) | 3,723,000
Cash and restricted cash at beginning of year | 9,000,000 | 5,277,000
Cash and restricted cash at end of year | 3,085,000 | 9,000,000
Supplemental disclosures of cash flow information: |  |
Cash paid during the period for interest | 7,000 | 9,000
Reconciliation of cash and restricted cash |  |
Cash | 3,085,000 | 8,939,000
Current portion of restricted cash | 0 | 61,000
Total cash and restricted cash | 3,085,000 | 9,000,000
Non-cash investing and financing activities: |  |
New operating lease agreement | 11,000 | 60,000
Modification of operating lease agreement | 0 | 192,000
Warrant modification | 0 | 37,000
Accrued preferred stock dividends | 0 | 1,000
Inducement to convert Series A-2 Preferred Stock to common | $ 0 | $ 300,000

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