Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 21,507	$ 26,381
Marketable securities	16,585	16,157
Accounts receivable, net of allowances of $86 and $77, respectively	543	672
Inventories, net	265	271
Prepaid expenses and other current assets	440	262
Current assets of discontinued operations		12,093
Total Current Assets	39,340	55,836
Property, Plant and Equipment
Gross property, plant and equipment	639	639
Less: accumulated depreciation	(638)	(638)
Net property, plant and equipment	1	1
Non-current assets of discontinued operations		4,198
Right-of-use lease asset	132	178
Intangible assets, net	78	100
Deferred income tax asset, net	234
Total Assets	39,785	60,313
Current Liabilities:
Accounts payable	310	60
Accrued compensation and commissions expense	170	330
Income taxes payable	1	524
Other accrued expenses and liabilities	106	479
Current portion of liabilities of discontinued operations		3,033
Total Current Liabilities	587	4,426
Deferred income tax liability, net		531
Other liabilities	708	468
Non-current liabilities of discontinued operations		145
Total Liabilities	1,295	5,570
Contingencies (Note M)
Stockholders' Equity
Common stock, $0.01 par value - 30,000,000 shares authorized; 5,434,521 shares issued and 5,352,937 shares outstanding at December 31, 2022, and 5,446,840 shares issued and 5,308,973 shares outstanding at December 31, 2021	53	53
Additional paid-in capital	46,346	45,817
(Accumulated deficit) retained earnings	(7,329)	9,453
Treasury stock, 81,584 shares held in treasury at cost at December 31, 2022 and 2021	(580)	(580)
Total Stockholders' Equity	38,490	54,743
Total Liabilities and Stockholders' Equity	$ 39,785	$ 60,313