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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020 | Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020
Cash flows from operating activities: |  |  |  |  |  |
Net loss | $ (3,433) | $ (3,129) |  |  |  |
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |  |  |  |
Depreciation and amortization | 722 | 815 |  |  |  |
Bad debt expense | 240 | 13 |  |  |  |
Amortization of debt discount | 0 | 34 |  |  |  |
Amortization of right of use asset | 130 | 302 |  |  |  |
Loss on disposal of equipment | 0 | 22 |  |  |  |
Common stock issued for services | 274 | 0 |  |  |  |
Stock-based compensation | 33 | 32 |  |  |  |
Loss on foreign currency remeasurement | 4 | 0 |  |  |  |
Impairment charges - property and equipment | 31 | 0 |  |  |  |
Impairment charges - goodwill | 0 | 541 | $ 541 |  |  |
Changes in operating assets and liabilities: |  |  |  |  |  |
Accounts receivable | 1,147 | (1,679) |  |  |  |
Inventory | (574) | 377 |  |  |  |
Prepaid expenses and other current assets | (456) | (133) |  |  |  |
Other assets | (7) | (59) |  |  |  |
Accounts payable | 766 | 274 |  |  |  |
Accrued expenses and other current liabilities | 332 | (398) |  |  |  |
Deferred revenue | (232) | 772 |  |  |  |
Lease liabilities | (212) | (320) |  |  |  |
Net cash used in operating activities | (1,235) | (2,536) |  |  |  |
Cash flows from investing activities: |  |  |  |  |  |
Purchases of property and equipment | (17) | 0 |  |  |  |
Net cash used in investing activities | (17) | 0 |  |  |  |
Cash flows from financing activities: |  |  |  |  |  |
Purchase of treasury stock | 0 | (7) |  |  |  |
Net cash used in financing activities | 0 | (7) |  |  |  |
Decrease in cash and restricted cash | (1,252) | (2,543) |  |  |  |
Cash and restricted cash at beginning of period | 5,277 | 4,602 | 4,602 |  |  |
Cash and restricted cash at end of period | 4,025 | 2,059 | 5,277 |  |  |
Reconciliation of cash and restricted cash |  |  |  |  |  |
Cash |  |  |  | $ 3,964 | $ 5,058 | $ 2,059
Current portion of restricted cash |  |  |  | 61 | 158 | 0
Total cash and restricted cash | 4,025 | 2,059 | $ 4,602 | 4,025 | $ 5,277 | 2,059
Cash paid during the period for interest | 0 | 90 |  |  |  |
Non-cash investing and financing activities: |  |  |  |  |  |
Issuance of preferred stock in exchange for accrued dividends | 0 | 98 |  |  |  |
Accrued preferred stock dividends |  |  |  | $ 1 |  | $ 4
Inducement to convert Series A-2 Preferred Stock to common | 300 | 0 |  |  |  |
Common stock issued for services | $ 3 | $ 0 |  |  |  |

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