Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Assets
Cash and cash equivalents	$ 1,203	$ 11,260
Restricted cash	120
Short-term investments		14,751
Accounts receivable, net	403	719
Inventories	482	658
Other inventory supplies	125	133
Prepaid expenses and other current assets	88	167
Assets held for sale		529
Total current assets	2,421	28,217
Grants receivable	250
Inventories, non-current	458	468
Property and equipment, net	2,211	2,301
Total assets	5,340	30,986
Liabilities and stockholders’ equity
Accounts payable	128	545
Accrued payroll	98	426
Accrued and other current liabilities	163	220
Corporate income and franchise taxes	302	327
Accrued real estate taxes	50	78
Advance payments		2
Current portion of long term debt, net of unamortized finance costs	24
Total current liabilities	765	1,598
Long term debt, net of current portion and unamortized finance costs	1,572
Total liabilities	2,337	1,598
Commitments and contingencies (Note 8)
Stockholders’ equity
Preferred stock, $.001 par value, 1,000,000 undesignated shares authorized, no shares issued or outstanding
Common stock, $.001 par value, 8,200,000 shares authorized; 3,011,917 and 2,995,680 shares issued; 2,462,889 and 2,446,652 shares outstanding, respectively	29	29
Additional paid-in capital	349,520	376,640
Treasury stock, at cost, 549,028 and 549,028 shares	(15,147)	(15,147)
Accumulated other comprehensive loss		(1)
Accumulated deficit	(331,399)	(332,133)
Total stockholders’ equity	3,003	29,388
Total liabilities and stockholders’ equity	$ 5,340	$ 30,986