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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Cash flows from operating activities:      
Net loss   $ (1,744) $ (3,852)
Adjustments to reconcile net loss to net cash used in operations:      
Depreciation and amortization $ 12 24 23
Stock-based compensation   556 584
Gain on disposal of mineral property interests, net (2,100) (2,883) (2,100)
Loss on other investments (77)   (47)
Reduction of provision for environmental liability   (240)  
Change in working capital account items:      
Other current assets   400 220
Accounts payable, accrued liabilities and other   (365) 384
Net cash used in operating activities   (4,252) (4,788)
Cash flows from investing activities:      
Disposition of short-term investments, net     400
Additions to plant and equipment   (5) (58)
Proceeds from option/sale agreements, net   2,500 2,280
Net cash provided by investing activities   2,495 2,622
Cash flows from financing activities:      
Proceeds from equity financing, net   51 1,062
Payment of taxes from withheld shares   (355) (396)
Net cash provided by/(used in) financing activities   (304) 666
Net decrease in cash and cash equivalents   (2,061) (1,500)
Cash and cash equivalents, beginning of period   12,757 7,762
Cash and cash equivalents, end of period $ 6,262 $ 10,696 $ 6,262