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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Cash flows from operating activities: |  |
Net loss | $ (4,931) | $ (15,237)
Adjustments to reconcile net loss to net cash used in operations: |  |
Depreciation and amortization | 45 | 49
Stock-based compensation | 779 | 887
Gain on disposal of mineral property interests, net | (2,883) | (2,100)
Gain on other investments |  | (46)
Reduction of provision for environmental liability | (240) |
Write-down of plant and equipment |  | 5,500
Change in working capital account items: |  |
Other current assets | 274 | (50)
Accounts payable, accrued liabilities and other | (457) | 377
Net cash used in operating activities | (7,413) | (10,620)
Cash flows from investing activities: |  |
Proceeds from sales of marketable securities |  | 339
Maturities of short-term investments, net | 384 | 16
Additions to plant and equipment | (5) | (139)
Proceeds from option/sale agreements, net | 2,500 | 2,415
Net cash provided by investing activities | 2,879 | 2,631
Cash flows from financing activities: |  |
Proceeds from equity financing, net | 244 | 13,385
Payment of taxes from withheld shares | (357) | (401)
Net cash provided by/(used in) financing activities | (113) | 12,984
Net increase/(decrease) in cash and cash equivalents | (4,647) | 4,995
Cash and cash equivalents, beginning of period | 12,757 | 7,762
Cash and cash equivalents, end of period | $ 8,110 | $ 12,757

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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
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- Definition Gain (Loss) On Disposal Of Mineral Property Interests, Net + References No definition available. + Details
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