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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Operating Activities:    
Net loss $ (6,717) $ (6,016)
Reconciliation of net loss to cash used in operations:    
Non-cash lease expense 59 73
Depreciation and amortization 124 107
Write-down of raw material inventory 694 0
Stock compensation expense 473 121
Effect of changes in operating working capital items:    
Decrease (increase) in other long-term assets 2,934 (2,488)
(Increase) decrease in prepaids and other current assets (3,037) 332
Increase (decrease) in payables and accrued liabilities 289 (1,049)
Net Cash Used In Operating Activities (5,181) (8,920)
Investing Activities:    
Capital expenditures (3,972) (51,858)
Proceeds from sale of assets 750  
Net Cash Used In Investing Activities (3,222) (51,858)
Financing Activities:    
Issuance of common stock, net 814 2,980
Payment of minimum withholding taxes on net share settlements of equity awards (96) (104)
Payments on finance lease liabilities (3) (5)
Net Cash Provided By Financing Activities 715 2,871
Net decrease in Cash and Cash Equivalents (7,688) (57,907)
Cash and Cash Equivalents, Beginning of Period 10,852 75,196
Cash and Cash Equivalents, End of Period 3,164 17,289
Supplemental Cash Flow Information    
Non-cash right-of-use asset obtained in exchange for operating lease liability   377
Non-cash right-of-use asset obtained in exchange for finance lease liability   28
Accrued capital expenditures (at end of period) 4,996 2,970
Total Supplemental Cash Flow Information $ 4,996 $ 3,375