CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Operating Activities:
Net loss	$ (9,825,000)	$ (9,538,000)
Reconciliation of net loss to cash used in operations:
Non-cash lease expense	88,000	100,000
Depreciation and amortization	187,000	163,000
Write-down of raw material inventory	964,000	0
Stock compensation expense	920,000	475,000
Effect of changes in operating working capital items:
Decrease (increase) in other long-term assets	3,171,000	(2,862,000)
(Increase) decrease in prepaids and other current assets	(358,000)	470,000
Increase (decrease) in payables and accrued liabilities	1,093,000	(995,000)
Net Cash Used In Operating Activities	(3,760,000)	(12,187,000)
Investing Activities:
Capital expenditures	(5,036,000)	(55,292,000)
Proceeds from sale of assets	1,500,000
Net Cash Used In Investing Activities	(3,536,000)	(55,292,000)
Financing Activities:
Issuance of common stock, net	1,089,000	4,130,000
Payment of minimum withholding taxes on net share settlements of equity awards	(96,000)	(104,000)
Payments on finance lease liabilities	(4,000)	(7,000)
Net Cash Provided By Financing Activities	989,000	4,019,000
Net decrease in Cash and Cash Equivalents	(6,307,000)	(63,460,000)
Cash and Cash Equivalents, Beginning of Period	10,852,000	75,196,000
Cash and Cash Equivalents, End of Period	4,545,000	11,736,000
Supplemental Cash Flow Information
Non-cash right-of-use asset obtained in exchange for operating lease liability		377,000
Non-cash right-of-use asset obtained in exchange for finance lease liability		28,000
Accrued capital expenditures (at end of period)	5,790,000	5,810,000
Total Supplemental Cash Flow Information	$ 5,790,000	$ 6,215,000