Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from continuing operating activities
Income (loss) from continuing operations	$ 717	$ (535)
Adjustments to reconcile net income (loss) from continuing operations to net cash used in continuing operations
Depreciation and amortization	90	108
Gain on sale or disposal of assets	(1,150)	(613)
Gain on sale of equity investments	(18)
Other gain	(189)
Stock-based compensation	181	371
Changes in operating assets and liabilities:
Accounts receivable	309	(536)
Inventories	186	312
Other inventory supplies	(7)	5
Prepaid expenses and other assets	118	150
Grants receivable	(250)
Accounts payable	(298)	78
Accrued payroll	(328)	132
Accrued real estate taxes	(27)	(13)
Corporate income and franchise taxes	(24)	15
Advanced payments	(1)	(18)
Accrued and other current liabilities	36	39
Net cash used in continuing operations	(655)	(505)
Cash flows used in discontinued operations		(178)
Cash flows from investing activities
Proceeds from sale or disposal of assets	1,693	613
Purchases of investments	(1,055)	(3)
Proceeds from sale of investments	15,824	2
Net cash provided by investing activities	16,462	612
Cash flows from financing activities
Proceeds from mortgage net of escrow funding and loan costs	1,560
Mortgage loan principal payments	(2)
Taxes paid related to net share settlement of equity awards	(210)	(182)
Return of shareholder capital	(27,092)
Net cash used in financing activities	(25,744)	(182)
Net decrease in cash and cash equivalents	(9,937)	(253)
Cash and cash equivalents, beginning of period	11,260	11,130
Cash and cash equivalents, end of period	1,323	10,877
Cash paid for interest	$ 8