Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 51,845	$ 71,084
Restricted cash	110	110
Prepaid materials	3,143	2,098
Prepaid expenses and other current assets	580	1,165
Total current assets	55,678	74,457
Other assets	2,334	1,987
Total Assets	58,012	76,444
Current liabilities
Accounts payable	3,536	679
Accrued expenses	1,989	919
Payroll liabilities	1,125	1,862
Other current liabilities	1,575	1,507
Total current liabilities	8,225	4,967
Total Liabilities	8,225	4,967
Commitments and contingencies (Note 13)
Stockholders' equity
Convertible preferred stock - $0.001 par value; 10,000,000 shares authorized; 577 and 582 shares issued and outstanding as of September 30, 2025 and December 31, 2024, respectively	0	0
Common stock - $0.18 par value; 350,000,000 shares authorized; 129,171,424 and 129,170,004 shares issued and outstanding as of September 30, 2025 and December 31, 2024, respectively	23,488	23,488
Additional paid-in capital	263,399	261,256
Treasury stock, at cost; 1,320,046 shares of common stock at September 30, 2025 and December 31, 2024	(1,475)	(1,475)
Accumulated deficit	(235,625)	(211,792)
Total Stockholders' Equity	49,787	71,477
Total Liabilities and Stockholders' Equity	$ 58,012	$ 76,444