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v3.22.1

Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Operating activities: |  |
Net loss | $ (12,623) | $ (15,004)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation | 60 | 68
Non-cash interest expense on convertible stockholder notes | 0 | 3
Gain on extinguishment of Paycheck Protection Program note payable | 0 | (509)
Share-based compensation | 1,661 | 2,952
Loss on disposal of property and equipment | 19 | 0
Changes in operating assets and liabilities: |  |
Accounts receivable | 85 | (85)
Inventory | 0 | 4
Prepaid expenses and other current assets | (179) | 241
Other receivable due from related party | 618 | (618)
Accounts payable | (239) | (168)
Accrued liabilities and other current liabilities | 130 | 797
Deferred revenue | 164 | (8)
Operating lease liability - current | (618) | 86
Operating lease liability - noncurrent | (24) | (614)
Right-of-use assets | 580 | 498
Net cash used in operating activities | (10,366) | (12,357)
Investing activities: |  |
Purchase of property and equipment | (116) | (32)
Net cash used in investing activities | (116) | (32)
Financing activities: |  |
Proceeds from sale of common stock | 2,001 | 0
Issuance costs of sale of common stock | (59) | (2,635)
Proceeds from Paycheck Protection Program note payable | 0 | 506
Tax withholding payments on settlement of restricted stock unit awards | 0 | (160)
Proceeds from exercise of common stock options | 5 | 0
Net cash provided by financing activities | 1,947 | 28,211
Net change in cash and cash equivalents | (8,535) | 15,822
Cash and cash equivalents at beginning of year | 21,407 | 5,585
Cash and cash equivalents at end of year | 12,872 | 21,407
Supplemental disclosure for noncash investing and financing activities: |  |
Restricted stock units issued to settle management bonus obligations | 393 | 391
Restricted stock units issued to settle board compensation obligations | 0 | 613
Common stock grants to former directors to settle board compensation obligations | 0 | 148
Right-of-use asset obtained in exchange for lease obligation | 1,896 | 0
Public Offering [Member] |  |
Financing activities: |  |
Proceeds from sale of common stock | 0 | 11,500
The $8.5 Million Registered Direct Offering [Member] |  |
Financing activities: |  |
Proceeds from sale of common stock | 0 | 8,500
The $10.5 Million Registered Direct Offering [Member] |  |
Financing activities: |  |
Proceeds from sale of common stock | $ 0 | $ 10,500

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